Adam fell by uxoriousness.
In my opinion, more accurate to say idolatry. Uxurious means "having or showing an excessive or submissive fondness for one's wife" (Oxford Languages). But when Adam tries to explain to God what he did, God replies, "Was she thy God, that her thou didst obey / Before his voice" (10:145). This meaning would recall the Bible's many warnings against pagan idolatry, which included sexual rites with goddesses.
Also, Adam is repeatedly shown as hungry for knowledge, even more than Eve. It's not just his wife that makes him fall. In 9:933-940, he clearly expresses the same pride as Eve, the same wish to be a god.
