(Aramaic) from ytseb; fixed, sure; concretely, certainty -- certain(-ty), true, truth.
see HEBREW ytseb
H3330. yatstsiyb
יַצִיב adjective certain, true (ᵑ7 id., firm, native (= אֶוְרָת)); — absolute ׳י Daniel 2:8, 45, emphatic בָא- 3:24(K§ 59.g); feminine singular בָא- 6:13 7:16; —
1 certain, sure Daniel 2:45; in exclamation 3:24 undoubtedly! מִןיַֿצִּיב 3:8 of a surety.
2 TRUE Daniel 6:13; feminine as substantive 7:16 the truth concerning, עַל of thing.