1
Stage 1 of 3
sedere
Latin · ancient
"to sit"
to sit, giving rise to assidere (to sit down beside, attend to)
2
Stage 2 of 3
assiduus
Latin · ancient
"constantly at one's task, diligent"
constantly sitting at one's task, diligent, from assidere
3
Stage 3 of 3
assiduous
English · 1530s
"showing great care, effort, and perseverance"
settled as the English word for showing great care and perseverance
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