'close-collared' is a modern English compound formed from 'close' + 'collared', where 'close' meant 'near; tight' and 'collar' meant 'a band around the neck.'

'close' comes via Old French 'clos' (from Latin 'claudere'/'clausus' meaning 'to shut, closed'), and 'collar' comes from Old French (or Old Northern French) 'coler' < Latin 'collarium' (from 'collum' meaning 'neck'). The two words were combined in modern English to form the adjective 'close-collared.'

Initially the elements separately referred to 'tight/closed' and 'neck-band'; over time they combined to describe clothing with a collar that sits closely around the neck ('having a close-fitting collar').