The term 'keenly-collected' is a compound adjective formed from 'keenly' and 'collected'. 'Keenly' originates from the Old English 'cēne', meaning 'bold' or 'brave', and 'collected' comes from the Latin 'collectus', meaning 'gathered together'.

'Keenly' evolved from Middle English 'ken', while 'collected' transitioned from Latin 'collectus' to Old French 'collecter', eventually becoming the modern English 'collected'.

Initially, 'keenly' meant 'boldly' or 'bravely', while 'collected' meant 'gathered'. Over time, 'keenly-collected' evolved to describe a state of sharp focus and calm composure.