- -ish [ish]suffix1. [ME < OE -isc, akin to Ger -isch, L -iscus, Gr -iskos] forming adjectivesa) of or belonging to (a specified nation or people) [Spanish, Irish]b) like or characteristic of [devilish, boyish]c) tending to be or verging on being (a specified person or thing) [knavish]d) somewhat, rather [tallish, bluish]e) Informal approximately, about [thirtyish]2. [ME -ishen, -ischen, -issen < OFr -iss-, -is-, stem element in pres. tense < L -isc-, in inceptive verbs] forming verbs: it was generalized from certain verbs of French origin [finish, cherish, punish]
English World dictionary. V. Neufeldt. 2014.