hy·dro·gen·ate 
(hīdrə-jə-nāt′, hī-drŏjə-)
(hīdrə-jə-nāt′, hī-drŏjə-)tr.v. hy·dro·gen·at·ed, hy·dro·gen·at·ing, hy·dro·gen·ates
To combine with or subject to the action of hydrogen, especially to combine (an unsaturated oil) with hydrogen to produce a solid fat.