olemus
Wiktionary:
verb
1. (transitive, intransitive) to draw together or nearer; to shorten, narrow, or lessen
The snail’s body contracted into its shell.
to contract one’s sphere of action
2. (grammar) to shorten by omitting a letter or letters or by reducing two or more vowels or syllables to one
The word “cannot” is often contracted into “can’t”.

näiteid
business contraction -- ärikonjunktuuri langus
contraction of the market -- turu ahenemine
contraction of words -- sõnade kontraktsioon
(näiteks do not = don't, I shall = I'll;
tehnilises dokumentatsioonis välditakse)
jet area contraction -- joa ahenemistegur
longitudinal contraction -- lühenemine
muscle contraction -- lihase kontraktsioon