rotary
UK[ˈrəʊtəri]US[ˈroʊtəri]
adj
operating by or causing rotation.
adj
having parts that rotate.
n
a rotary machine or device, especially a traffic circle.
Morpheme Breakdown
rot
ary
rot
turn
ary
adjective suffix
Etymology
the word 'rotary' has its origins in the latin noun 'rota', meaning 'wheel'. this latin term is itself derived from the proto-indo-european root ret-, which conveyed the sense of 'to run' or 'to roll'. the suffix '-ary', from latin '-arius', is a common adjectival ending used to form words indicating a relationship or connection. therefore, the literal construction 'pertaining to a wheel' evolved logically into the modern abstract meanings relating to rotation or having rotating parts, capturing the fundamental mechanical principle of circular motion.
Analysis
Structure: rot (turn) + ary (adjective suffix)
rot (from latin 'rota', meaning wheel) + ary (from latin '-arius', forming adjectives meaning 'pertaining to' or 'connected with').
Examples
the engine uses a rotary mechanism to convert pressure into motion.
we entered the busy rotary and took the second exit.
the old rotary phone was a common household item in the mid-20th century.