岳父
yuè fù · HSK 7
father
⛰️👴 岳 mountain + 父 father = the towering elder, your wife's dad
父 (fù) is father. 岳 (yuè) means a high mountain or lofty peak, so 岳父 frames the wife's father as a mountain-tall elder you honor. Pair it with 岳母 (yuè mǔ) for the wife's mother.