-ish1
/ɪʃ/suffix
Forming adjectives:
1(From nouns) having the qualities or characteristics of: apish girlish
1.1Of the nationality of: Swedish
2(From adjectives) somewhat: yellowish
2.1 informal Denoting an approximate age or time of day: sixish
Origin
Old English -isc, of Germanic origin; related to Old Norse -iskr, German and Dutch -isch, also to Greek -iskos (suffix forming diminutive nouns).
-ish2
/ɪʃ/suffix
Forming verbs such as abolish, establish.
Origin
From French -iss- (from stems of verbs ending in -ir), from Latin -isc- (suffix forming inceptive verbs); compare with -ish1.