Querulous (#1)

(Adjective) to be grumpy , grummumbling, or complaining

Synonyms: petulant, whiny, uptight, upset, captious

Antonyms: cheerful, happy, easy going,

The young kid in the restaurant was very querulous because his parents wouldn't let him get a dessert.

After a very rough day the student was very querulous around everyone.

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