1
Stage 1 of 3
aptus
Latin · ancient
"fit, suitable"
fit, suitable, combined with ad- (to)
2
Stage 2 of 3
adaptare
Latin · ancient
"to fit to"
to fit to, from ad- and aptare (frequentative of apere, to fasten)
3
Stage 3 of 3
adapt
English · 1600s
"to adjust something to suit new conditions"
settled as the English word for adjusting something to suit new conditions
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