Shivah Asar Betammuz
[ Sephardic Hebrew shee-vah ah-sahr bi-tah-mooz; Ashkenazic Hebrew shiv-uh aw-suh r bi-tah-moo z, shi-vaw aw-sawr ]
/ Sephardic Hebrew ʃiˈvɑ ɑˈsɑr bɪˈtɑ muz; Ashkenazic Hebrew ˈʃɪv ə ˈɔ sər bɪˈtɑ mʊz, ʃɪˈvɔ ɔˈsɔr /
noun
a Jewish fast day observed on the 17th day of Tammuz in memory of the breach of the walls of Jerusalem by the Romans in a.d. 70.
Also
Shibah Asar Betammuz.
Origin of Shivah Asar Betammuz
From the Hebrew word
shibhʿāh ʿāśār bə tammuz 17th day of Tammuz