IPA: /kəʊˈveɪlənsi/
KK: /kəʊˈveɪlənsi/
The ability of an atom to form covalent bonds by sharing electrons with other atoms.
The covalency of carbon allows it to bond with many different elements.
Covalency → It is formed from "co-" (meaning together) and "valent" (from Latin "valens", meaning strong or having worth). The term describes the state of atoms sharing electrons together, thus forming a strong bond.
Think of atoms coming 'together' ('co-') to form a 'strong bond' ('valent') — that's what covalency means.