slapdash

the word slapdash is a compound formed in english from two onomatopoeic and action-oriented roots. slap, imitative of the sound of a quick blow, and dash, suggesting a sudden, forceful movement, were combined in the late 17th century. their literal meanings of hasty physical actions were figuratively extended to describe any activity performed with hurried, impulsive carelessness. this vivid metaphorical combination perfectly captures the essence of doing something in a reckless, offhand manner.

Structure: slap (sense) + dash (sense) slap: of imitative origin (onomatopoeic); conveys the sense of a quick, impulsive, or careless action. dash: from middle english daschen, likely of scandinavian origin; conveys the sense of a sudden, rapid movement or blow.