English
conscientious
Conscientious comes from Medieval Latin cōnscientiōsus.
- Medieval Latinc. 600–1500cōnscientiōsus
- Middle Frenchc. 1400–1600conscientieux
- Englishtodayconscientious
attested reconstructed ? uncertain or disputed
Lineage
- Medieval Latinc. 600–1500cōnscientiōsus
- Middle Frenchc. 1400–1600conscientieux
- Englishtodayconscientious
The story
Its English equivalent could possibly be analyzed as conscient + -ous.
Every English word from Medieval Latin cōnscientiōsus
Today it means
adj Thorough, careful, or vigilant in one’s task performance; painstaking.
Language periods are conventional ranges, not dates for this word.
Etymograph / Medieval Latin cōnscientiōsus / conscientious