- Ⅰ.-ing  ► SUFFIX 1) denoting a verbal action, activity, or result: building. 2) denoting material used for or associated with a process: piping. 3) forming the gerund of verbs (such as painting as in I love painting).ORIGIN Old English.Ⅱ.-ing  ► SUFFIX 1) forming the present participle of verbs: calling. 2) forming adjectives from nouns: hulking.ORIGIN from Latin -ent.
English terms dictionary. 2015.