tranquillity

• tranquility

tranquil +‎ -ity, from Middle English tranquillite, from Old French tranquillite, tranquilité, from Latin tranquillitas.

• IPA^(key): /tɹæŋˈkwɪl.ɪ.ti/

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• Hyphenation: tran‧quil‧li‧ty

tranquillity (usually uncountable, plural tranquillities)

1. The state of being tranquil; peacefulness, the absence of disturbance or stress; serenity; calm.

   Synonyms: calm, peace, stillth

• The spelling tranquillity is more common in the UK (less common in the US), while tranquility is more common in the US (less common in the UK).

• “tranquillity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “tranquillity”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.