Gaasilisest

Gaasilisest is an Estonian word form derived from the adjective gaasiline, meaning "gaseous" or "of gas." It is the singular elative case of that adjective and is used to indicate movement or origin away from, or a source within, something described as gaseous. The elative case in Estonian typically corresponds to English prepositions like "from" or "out of."

Morphology: gaas (root meaning "gas") + -iline (adjectival suffix) → gaasiline (adjective) + -st (elative case ending) → gaasilisest. Grammatically, it behaves like a declined adjective and can agree with nouns or be used substantively when the noun is omitted but understood from context.

Usage examples:

- Estonian: Aine läks gaasilisest olekust vedelaks.

- English: The substance changed from a gaseous state to a liquid.

As an elative form, gaasilisest appears in constructions expressing origin, separation, or transformation (e.g., from a gaseous phase), and can be combined with nouns, postpositions, or verbs that select for the elative case. It is part of the regular declension pattern for adjectives ending in -line and follows Estonian case rules for agreement and declension.

Related forms include gaasiline (nominative), gaasilise (genitive), and gaasilist (partitive). Understanding gaasilisest requires familiarity with Estonian case morphology and the semantic role of the elative case.