IPA: /kənˈtræktəˌbɪlɪti/
KK: /kənˈtræktəˌbɪlɪti/
The ability of something to become smaller or tighter.
The contractibility of the muscle allows it to pull and create movement.
Contractibility → It is formed from "contract" (from Latin "contractus", meaning drawn together) and "-ibility" (from Latin "-ibilis", meaning capable of). The word "contractibility" refers to the capability of being drawn together or reduced in size.
Think of something that is 'capable of being drawn together' — 'contract' means to draw together, and '-ibility' indicates the ability to do so.