disquietude
[noun]
Synonyms: care, anxiety, concern, concernment, disquiet, solicitude, unease, uneasiness, worry, unrest, ailment, ferment, inquietude, restiveness, restlessness, storm and stress, Sturm und Drang, turmoil

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Antonyms: quietness, quietude

[TahlilGaran] English Synonym Dictionary ▲

dis·qui·e·tude (dĭs-kwīĭ-td, -tyd)
n.
Worried unease; anxiety:
a state of brooding disquietude about a colleague's success.

[TahlilGaran] American Dictionary ▲