Meaning

verb come or be in close contact with; stick or hold together and resist separation

verb cause to form a united, orderly, and aesthetically consistent whole

verb have internal elements or parts logically connected so that aesthetic consistency results

originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin haereō Latin cohaereōbor. English cohere Borrowed from Latin cohaereō (“cohere, cling (closely) together, harmonise, be consistent (with), be in agreement with”).

Etymology from Wiktionary, CC BY-SA 3.0