1) Hydrogenate 
• (v. t.) To combine with hydrogen; to treat with, or subject to the action of, hydrogen; to reduce; -- contrasted with oxidize.
Hy'dro·gen·ize transitive verb [ imperfect & past participle Hydrogenized ; present participle & verbal noun Hydrogenizing .] (Chemistry) To combine with hydrogen; to treat with, or subject to the action of, hydrogen; to reduce; -...
hydrogenate.