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

WORD ORIGIN

1610s, from Latin observat-, past participle stem of observare (see observe) + -ive.

MORE RELATED WORDS FOR OBSERVATIVE

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