Meaning of -ISH in English
a verb ending, originally appearing in certain verbs of french origin; as, abolish, cherish, finish, furnish, garnish, impoverish.
2. -ish ·- a suffix used to from adjectives from nouns and from adjectives. it denotes relation, resemblance, similarity, and sometimes has a diminutive force; as, selfish, boyish, brutish; whitish, somewhat white.
Webster English vocab. Английский словарь Webster. 2012