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English word curious comes from Latin cura, Proto-Indo-European *kois-
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cura (Latin)
(agriculture) Rearing, culture, care.. (medicine) Medical attendance, healing.. (rare) An attendant, guardian, observer.. Attention, management, administration, charge, care; command, office; guardianship.. Written work, writing.. Care, concern, thought; trouble, solicitude; anxiety, grief, sorrow.
*kois- (Proto-Indo-European)
curiosum (Latin)
curios (Old French)
corious (Middle English)
curious (English)
(archaic) Artfully constructed; made with great elegance or skill.. (archaic) Fastidious, particular; demanding a high standard of excellence, difficult to satisfy.. Inquisitive; tending to ask questions, investigate, or explore.. Prompted by curiosity.. Unusual; odd; out of the ordinary; bizarre.