Ing

1.
a suffix of nouns formed from verbs, expressing the action of the verb or its result, product, material, etc. (the art of building; a new building; cotton wadding). It is also used to form nouns from words other than verbs (offing; shirting). Verbal nouns ending in -ing are often used attributively (the printing trade) and in forming compounds (drinking song). In some compounds (sewing machine), the first element might reasonably be regarded as the participial adjective, -ing2, the compound thus meaning “a machine that sews,” but it is commonly taken as a verbal noun, the compound being explained as “a machine for sewing.”.
1.
a suffix forming the present participle of verbs (walking; thinking), such participles being often used as participial adjectives: warring factions.
1.
a native English suffix meaning “one belonging to,” “of the kind of,” “one descended from,” and sometimes having a diminutive force, formerly used in the formation of nouns: farthing; shilling; bunting; gelding; whiting.
suffix
1.
(from verbs) the action of, process of, result of, or something connected with the verb: coming, meeting, a wedding, winnings
2.
(from other nouns) something used in, consisting of, involving, etc: tubing, soldiering
3.
(from other parts of speech): an outing
suffix
1.
forming the present participle of verbs: walking, believing
2.
forming participial adjectives: a growing boy, a sinking ship
3.
forming adjectives not derived from verbs: swashbuckling
suffix
1.
a person or thing having a certain quality or being of a certain kind: sweeting, whiting

suffix attached to verbs to mean their action, result, product, material, etc., from Old English -ing, -ung, from Proto-Germanic *unga (cf. Old Norse -ing, Dutch -ing, German -ung). Originally used to form nouns from verbs and to denote completed or habitual action. Its use has been greatly expanded in Middle and Modern English.

suffix used form the present participle of verbs, from Old English -ende (cf. German -end, Gothic -and, Sanskrit -ant, Greek -on, Latin -ans). It evolved into -ing in 13c.-14c.
inguinal