Antonyms of adj ambitious

2 senses of ambitious

Sense 1
ambitious (vs. unambitious) -- (having a strong desire for success or achievement)

unambitious (vs. ambitious), ambitionless -- (having little desire for success or achievement)
        => shiftless -- (lacking or characterized by lack of ambition or initiative; lazy; "a shiftless student"; "studied in a shiftless way")

Sense 2
ambitious, challenging -- (requiring full use of your abilities or resources; "ambitious schedule"; "performed the most challenging task without a mistake")

INDIRECT (VIA difficult) -> easy -- (posing no difficulty; requiring little effort; "an easy job"; "an easy problem"; "an easy victory"; "the house is easy to heat"; "satisfied with easy answers"; "took the easy way out of his dilemma")

Similarity of adj ambitious

2 senses of ambitious

Sense 1
ambitious (vs. unambitious) -- (having a strong desire for success or achievement)
       => pushful, pushy -- (marked by aggressive ambition and energy and initiative; "an aggressive young executive"; "a pushful insurance agent")
       => aspirant, aspiring (prenominal), wishful -- (desiring or striving for recognition or advancement)
       => compulsive, determined, driven -- (strongly motivated to succeed)
       => manque, would-be (prenominal) -- (unfulfilled or frustrated in realizing an ambition)
       => overambitious -- (excessively ambitious)
          Also See-> enterprising#1

Sense 2
ambitious, challenging -- (requiring full use of your abilities or resources; "ambitious schedule"; "performed the most challenging task without a mistake")
       => difficult (vs. easy), hard -- (not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?")