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Condescending
Acting superior or looking down on others; disdainful
Sulking
Silently and angrily upset, maybe because of an offense
Fawning
Trying to get someone's attention or approval by acting overly submissive and humble
Optimistic
Having a positive outlook and expecting good things to happen
Jaded
Tired/bored after having too much of something
Ardent
Intense enthusiasm/passion for something
Scathing
Harshly critical and hurtful
Unassuming
Modest and not trying to draw attention to oneself, unpretentious
Solemn
Serious, sober, formal, respectful
Frivolous
Self-indulgently carefree, unconcerned about or lacking any serious purpose