TgO Deut25:7 :לָא אַבֵי לְיַבָמוּתִי‏ : he does not want to marry me as levir
See the entire entry for ybm vb. D to marry a brother's widow

TgO Deut25:7 :וְאִם לָא יִצבֵי גַברָא לְמִיסַב יָת יְבִמתֵיה‏ : but if the man does not wish to marry his sister-in-law
See the entire entry for yaḇmā, yḇamṯā n.f. sister-in-law