roll-on
UK[ˈrəʊl ɒn]US[ˈroʊl ɑːn]
n
a type of deodorant or perfume that is applied to the skin using a small rolling ball at the top of the container
n
a type of luggage with wheels and a retractable handle, designed to be pulled along
adj
describing a product or item that is applied or moved by means of a rolling action
Morpheme Breakdown
roll
on
roll
to move by turning over and over
on
indicating application or attachment
Etymology
the compound 'roll-on' is a modern english formation that transparently combines two native elements to describe function. the first element, 'roll', carries its ancient sense of circular motion derived from the proto-indo-european root ret- meaning "to run, to roll". the second element, 'on', is a fundamental spatial preposition from old english. the term's logic is entirely descriptive: it literally means "to apply by rolling on", a meaning directly preserved in its primary modern use for a ball-applicator deodorant. this functional naming was later extended by analogy to wheeled luggage, maintaining the core concept of movement via rolling.
Analysis
Structure: roll (to move by turning over and over) + on (indicating application or attachment)
'roll' originates from the old french 'roller', from latin 'rotulus', a diminutive of 'rota' (wheel), indicating a circular motion. 'on' is from old english 'on', a preposition/adverb indicating position, contact, or continuation.
Examples
she prefers a roll-on deodorant because it feels less sticky than a spray.
for his business trip, he packed everything into a convenient roll-on suitcase.
the new roll-on glitter is easy for children to apply without making a mess.