H7448. resen
I. רֶ֫סֶן noun masculine[Isa 30:28]:
1 halter;
2 jaw (?); —
1 absolute ׳ר [Psa 32:9] restraining mouth of horse or ass (+מֶתֶג); figurative of עַמִּים׳ר עַללְֿחָיֵי י, ׳שֵׁם [Isa 30:28]; ׳ר שִׁלֵּ֑חוּ מִמָּנַי [Job 30:11], i.e. threw off restraint.
2 suffix רִסְנוֺ כֶּפֶל [Job 41:5] the double of his jaw, his double jaws (of croc.), si vera 1.; connection of meanings strange, || לְבוּשׁוֺ מְּנֵי, whence GHBW right Du conjecture סִיֹנוֺ.