romper

The word 'romper' is a relatively modern English formation, built upon the native verb 'romp'. The verb 'romp' itself emerged in the early 18th century, likely as a variant of 'ramp', a word with a history of conveying violent or vigorous motion, stemming from Old French 'ramper'. The suffix '-er', a stalwart of Germanic word formation, was appended to create an agent noun. Initially, 'romper' simply meant "one who romps." Its application to a one-piece garment for children arose in the 20th century, primarily in American English, following a common pattern where the '-er' suffix denotes an object associated with an activity—in this case, a playful, comfortable suit ideal for a child's boisterous play.

Structure: romp (to play boisterously) + er (agent/instrument suffix) - romp: Likely an alteration of 'ramp', from Middle English 'rampen' (to rear, rage, rampage), of Old French origin, meaning to play or move in a lively, boisterous manner. - er: A native English suffix of Germanic origin, used to form agent nouns (one who does something) or instrumental nouns (a thing that does something).