A primitive root; to cover over (the mouth), i.e. To fast -- X at all, fast.
H6684. tsum
[צוּם] verb abstain from food, fast (Late Hebrew id.; Arabic () , Ethiopic Aramaic צוּם, ); —
Qal Perfect2masculine singular צַמְתָּ 2 Samuel 12:21; 2masculine plural צַמְתֶּם Zechariah 7:5, suffix צַמְתֻּנִי 7:5; Imperfect3masculine singular וַיָּ֫צָם 2 Samuel 12:16, וַיָּצוֺ֑ם 1 Kings 21:27; 1singular אָצוּםEsther 4:16, etc.; Imperative masculine plural צוּמוּ 4:16; Infinitive absolute צוֺם Zechariah 7:5; Participle צָם 2 Samuel 12:23; Nehemiah 1:4; — fast, in mourning the dead 1 Samuel 31:13 = 1 Chronicles 10:12; 2 Samuel 1:12; in worship (contrition, intercession, etc.) Jon 20:26; 1 Samuel 7:6; 2 Samuel 12:16 (with accusative of congnate meaning with verb צוֺם; "" בִּקֵּשׁ), 12:23 and (+בָּכָה), 12:21; 12:22 (q. v. for explanation), Jeremiah 14:12; Zechariah 7:5 (+סְפוֺד), צַמְתֻּנִי הֲצוֺם 7:5 (Ges§ 117x) was it at all unto me [׳י] that ye fasted ? צָם וָאֱהִי Nehemiah 1:4 (periphrase conjectural; +מִתְמַּלֵּל), compare Ezra 8:23 (+בִּמֵּשׁ), Esther 4:16 (with עַל person for whom), 4:16, Isaiah 58:3 ("" נַפְשֵׁנוּ עִנִּינוּ), 58:4 (with ל of thing), 58:4; once in disappointment and vexation 1 Kings 21:27.