Definition of marionettish in US English:
marionettish
(also marionetish)
adjective
Suggestive of a marionette in appearance or movement.
Origin
1920s; earliest use found in Eugene O'Neill (1888–1953), dramatist. From marionette + -ish.
Pronunciation
marionettish
/marɪəˈnɛtɪʃ/