1
Stage 1 of 3
aptus
Latin · ancient
"fit, suitable"
fit, suitable
2
Stage 2 of 3
aptitudo
Late Latin · medieval
"fitness, suitability"
fitness, suitability, from aptus
3
Stage 3 of 3
aptitude
English · 1400s
"a natural ability or talent for something"
settled as the English word for a natural ability or talent for something
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