ISH, a termination of English words,is, in Sax. isc. Dan.isk, G. isch and not improbably, it is the termination esque, in French, as in grotesque, It.esco, in grotesco, and the Latin termination of the inceptive verb, as in fervesco. Annexed to English adjectives, ish denotes diminutive, or a small degree of the quality as whitish, from white yellowish, from yellow.
ISH annexed to names forms a possessive adjective as in Swedish, Danish, English.
ISH annexed to common nouns forms an adjective denoting a participation of the qualities expressed by the noun as foolish, from fool roguish, from rogue brutish, from brute. This is the more common use of this termination.