longtime
UK[ˈlɒŋtaɪm]US[ˈlɔːŋtaɪm]
adj
having existed or continued for a long period of time
Morpheme Breakdown
long
time
long
extended duration
time
period
Etymology
the word 'longtime' is a transparent compound formed from two native english elements. 'long', with its dual sense of physical length and temporal duration, combines with 'time', the fundamental concept of a measured or measurable period. this straightforward combination in middle english created an adjective that literally means 'of long time'. the logic is purely descriptive, directly attributing the quality of extended duration to a person, relationship, or state. it exemplifies how english readily forms new concepts by joining familiar, concrete words, with the compound's meaning being immediately accessible from the sum of its parts.
Analysis
Structure: long (extended duration) + time (period)
'long' is from old english 'lang, long', meaning 'having great linear extent, lasting a considerable time'. 'time' is from old english 'tīma', meaning 'a limited period or interval, season'. both are of germanic origin.
Examples
he is a longtime friend and trusted advisor.
she has been a longtime advocate for environmental protection.
the company has enjoyed longtime success in the industry.