adjustable
Word family
- adjustverbB2
- adjustmentnounB2
- readjustverbC1
- unadjustableadjectiveC1
Synonym discussion
Sense: adjective/1
All four describe something that is not fixed, but they are not interchangeable. 'Adjustable' is the most physical: it usually points to a part you can move or set, like an adjustable strap or an adjustable seat. 'Adaptable' is broader and more abstract; it suggests that a person, animal, or system can change to handle new situations, as in 'an adaptable team member'. 'Flexible' is the everyday choice for plans, rules, and schedules — 'flexible working hours' sounds natural, while 'adjustable working hours' sounds odd. 'Variable' is more technical and often appears with measurements or settings, like 'variable speed' on a fan. So you might say: 'The chair is adjustable, my schedule is flexible, my new colleague is adaptable, and the fan has variable speeds.'
Common collocations
Etymology
Formed in English from the verb 'adjust' plus the suffix '-able', meaning 'able to be adjusted'. 'Adjust' itself came into English in the early 1600s from Old French 'ajuster', which traces back to Late Latin 'ad-' (to) and 'iuxta' (near, close), with the original idea of bringing two things close together so they fit. The '-able' ending is a productive English suffix borrowed from French and Latin, used to form adjectives meaning 'capable of being [verbed]'.