1175-1225;Middle English < Late Latinintentus an aim, purpose, Latin: a stretching out (inten(dere) to intend + -tus suffix of v. action); replacing Middle Englishentent(e) < Old French < Late Latin, as above
"purpose," early 13c., from O.Fr. entente, from L.L. intentus "attention," from L. intentus (fem. intentia), pp. of intendere "stretch out, lean toward, strain," lit. "stretched out" (see intend). Intentionally "on purpose" is from 1660s.
"very attentive," 1606, from L. intentus "attentive, eager, strained," pp. of intendere "to strain, stretch" (see intend).