Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Musicpianissimopi‧a‧nis‧si‧mo /ˌpiːəˈnɪsəməʊ $ -moʊ/ adjective, adverb technical played or sung very quietly OPP fortissimoOrigin pianissimo (1700-1800) Italian “very quiet” ldoceonline.com