Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

1660s, from Latin inobservantem (nominative inobservans) "inattentive, negligent," from in- "not" (see in- (1)) + observans (see observance).

MORE RELATED WORDS FOR INOBSERVANT

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.