science

Prolative case

Prolative case is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Prolative case rather than just read about it. In short: In grammar, the prolative case (abbreviated prol), also called the vialis case (abbreviated via), prosecutive case (abbreviated pros), traversal case, mediative case, or translative case, is a grammatical case of a noun or pronoun that has the basic meaning of "by way of" or "via". In Finnish, the prolative case follows an established application in a number of fossilized expressions to indicate "by (medium of trans…

Key takeaways

Prolative case belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Prolative case to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Prolative case from memory before moving on to harder problems.

Reference excerpt

In grammar, the prolative case (abbreviated prol), also called the vialis case (abbreviated via), prosecutive case (abbreviated pros), traversal case, mediative case, or translative case, is a grammatical case of a noun or pronoun that has the basic meaning of "by way of" or "via". In Finnish, the prolative case follows an established application in a number of fossilized expressions to indicate "by (medium of transaction)". It can be used in other constructions, but then it does not sound "natural". Examples would be "postitse" ("by post"), "puhelimitse" ("by telephone"), "meritse" ("by sea"), "netitse" ("over the Internet"). A number of Finnish grammarians classify the prolative form as an adverb because it does not require agreement with adjectives like other Finnish cases. This claim is not true, however, because an adjective will agree with the prolative: "Hän hoiti asian pitkitse kirjeitse" ("He/she dealt with the matter by way of a long letter"). The prolative exists in a similar state in the Estonian language, with the suffix "-(t)si", as seen in "jalgsi" ("by foot"), and in the Karelian language, with the suffix "-čči", as seen in "rannačči" ("by the coast"). The vialis case in Eskimo–Aleut languages has a similar interpretation, used to express movement using a surface or way. For example, in the Greenlandic language umiarsuakkut 'by ship' or in Central Alaskan Yup'ik kuigkun 'by river' or ikamrakun 'by sled'. Basque grammars frequently list the nortzat / nortako case (suffix -tzat or -tako) as "prolative" (prolatiboa). However, the meaning of this case is unrelated to the one just described above for other languages and alternatively has been called "essive / translative", as it means "for [something else], as (being) [something else]"; e.g., hiltzat eman "to give up for dead", lelotzat hartu zuten "they took him for a fool". The meaning "by way of" of the case labelled prolative in the above languages is expressed in Basque by means of the instrumental (suffix -[e]z). This case is also called the prosecutive case in some languages. It is found under this name in Tundra Nenets, in Old Basque and, with spatial nouns, in Mongolian.

Worked examples

Example 1 — a first encounter with Prolative case

Start with the simplest possible case. Write down what Prolative case claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Prolative case before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Prolative case ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Prolative case

In research: Prolative case appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Prolative case in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Prolative case is common in secondary-school and first-year university syllabi. It links to neighbouring topics Grammatical cases, so understanding it makes those chapters shorter.
In everyday life: Look for Prolative case outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Prolative case in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Prolative case means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Prolative case out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Prolative case in simple terms?

Why does Prolative case matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Prolative case?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Prolative case.