S: (v) fail, betray (disappoint, prove undependable to; abandon, forsake) "His sense of smell failed him this time"; "His strength finally failed him"; "His children failed him in the crisis"
S: (v) cheat on, cheat, cuckold, betray, wander (be sexually unfaithful to one's partner in marriage) "She cheats on her husband"; "Might her husband be wandering?"
S: (v) deceive, betray, lead astray (cause someone to believe an untruth) "The insurance company deceived me when they told me they were covering my house"