“Rejoice” | תִּשְׂמָ֑ח | Probably to brighten up, i.e., (figuratively) be (causatively, make) blithe or gleesome | Rejoice |
“not” | אַל | Not (the qualified negation, used as a deprecative); once (Job 24:25) as a noun, nothing | not |
“when thine enemy” | אֽ֭וֹיִבְיךָ | Hating; an adversary | thine enemy |
“falleth,” | בִּנְפֹ֣ל | To fall, in a great variety of applications (intransitive or causative, literal or figurative) | falleth |
“and let not” | אַל | Not (the qualified negation, used as a deprecative); once (Job 24:25) as a noun, nothing | let not |
“thine heart” | לִבֶּֽךָ׃ | The heart; also used (figuratively) very widely for the feelings, the will and even the intellect; likewise for the center of anything | thine heart |
“be glad” | יָגֵ֥ל | Properly, to spin round (under the influence of any violent emotion), i.e., usually rejoice, or (as cringing) fear | glad |
“when he stumbleth:” | וּ֝בִכָּשְׁל֗וֹ | To totter or waver (through weakness of the legs, especially the ankle); by implication, to falter, stumble, faint or fall | stumbleth |