tranquillissimo

== Italian == === Etymology === From tranquillo +‎ -issimo. === Pronunciation === IPA(key): /tran.kwilˈlis.si.mo/ Rhymes: -issimo Hyphenation: tran‧quil‧lìs‧si‧mo === Adjective === tranquillissimo (feminine tranquillissima, masculine plural tranquillissimi, feminine plural tranquillissime) superlative degree of tranquillo (“very quiet, very peaceful, very calm”)