a native English suffix of adjectives meaning “characterized by or inclined to” the substance or action of the word or stem to which the suffix is attached: juicy; grouchy; rumbly; dreamy. Sometimes used to mean “allowing, fostering, or bringing about” the specified action: sippy.

the Y, Informal. the YMCA, YWCA, YMHA, or YWHA.

a noun-forming suffix with a variety of functions in contemporary English, added to monosyllabic bases to create words that are almost always informal. Its earliest use, probably still productive, was to form endearing or familiar names or common nouns from personal names, other nouns, and adjectives ( Billy; Susie; birdie; doggie; granny; sweetie; tummy ). The hypocoristic feature is absent in recent coinages, however, which are simply informal and sometimes pejorative ( boonies; cabby; groupie; hippy; looie; Okie; preemie; preppy; rookie ). Another function of -y2 -ie is the formation from adjectives of nouns that denote exemplary or extreme instances of the quality named by the adjective ( baddie; biggie; cheapie; toughie ), sometimes focusing on a restricted, usually unfavorable sense of the adjective ( sharpie; sickie; whitey ). A few words in which the informal character of -y2 -ie has been lost are now standard in formal written English ( goalie; movie ).

yen ¹( def 1 ).

a suffix of various origins used in the formation of action nouns from verbs ( inquiry ), also found in other abstract nouns:

the 25th in order or in a series.

(sometimes lowercase) the medieval Roman numeral for 150. Compare Roman numerals.

Electricity. admittance ( def 4 ). Sometimes y

Chemistry. yttrium ( def ).

Biochemistry. tyrosine ( def ).

an unknown quantity.

(in Cartesian coordinates) the y-axis.

a prefix occurring in certain obsolete words ( ywis ) and especially in archaic past participles:

yard; yards.

year; years.