Or siys {sece}; a primitive root; to be bright, i.e. Cheerful -- be glad, X greatly, joy, make mirth, rejoice.
H7797. sus
or sis שִׂישׂ שׂוּשׂ, verb exult, rejoice (NöZMG xxxvii(1893), 536 derives ('perhaps') from interjection, as an enticing call, so Gerber20); —
QalPerfect3masculine singular שָׂשׂ Deuteronomy 28:63 +, 1 singular שַׂשְׂתִּי Psalm 119:14, etc.; Imperfect3masculine singular יָשִׂישׂ Deuteronomy 28:63 +, 3 masculine plural יְשֻׂשׂוּם Isaiah 35:1 (Ges§ 47n Köi. 510, but ם erroneous. Kenn Ol§ 244 a, probably dittograph, so Lo Hi Gr CheHpt Marti), etc.; Imperative feminine singular שִׂישִׂי Lamentations 4:2, masculine plural שִׂישׂוּ Isaiah 65:18; 66:10; Infinitive absolute שׂוֺשׂ 61:10; construct לָשׂוּשׂ Deuteronomy 30:9; — exult, display joy, with עַל over, 28:63 (twice in verse); 30:9 (twice in verse); Jeremiah 32:41; Isaiah 62:5; Zephaniah 3:1 (+ בְּשִׂמְחָה; "" גִּיל), Psalm 119:162; with ב Isaiah 61:10 (אָשִׂישׂ שׂוֺשׂ), 65:19; Psalm 35:9 (all "" גּיל) 40:17; 68:4 (+ בְּשִׂמְחָה; "" עָלַץ), 70:5 (all "" שָׂמַח; 119:14; Job 39:21 (horse), Psalm 19:6 (sun, as athlete); with כִּי and clause Lamentations 1:21; absolute Isaiah 35:1; 65:18 (both "" גִּיל), 64:4 (but strike out ᵐ5 וְ שָׂשׂ Gr Du CheHpt Marti), Isa 68:14; Lamentations 4:21 ("" שָׂמַח), Job 3:22 ("" אֱלֵיגִֿיל שָׂמַח), Isaiah 66:10 (accusative of congnate meaning with verb; "" גִּיל), שָׂמַח). — Ezekiel 21:15 is corrupt, Co reads לְאַנְשֵׁי (for נָשִׂישׂ), Krae לִנְשִׂיאֵי, other conjectures in Commentaries: on clause see especially Da ToyHeb.Hpt.