early 14c., "acquire, get," from Old French encrochier "seize, fasten on, hang on (to), cling (to); hang up, suspend," literally "to catch with a hook," from en- "in" (see en- (1)) + croc "hook," from Old Norse krokr "hook" (see crook). Meaning "seize wrongfully" is from c.1400. Sense of "trespass" is first recorded 1530s. Related: Encroached; encroaches; encroaching.
