can't help

Also, can't help but or cannot but. Be unable to do otherwise. For example, I can't help thinking that the keys will turn up eventually, or He couldn't help but believe he would pass the entrance exam, or I cannot but applaud his efforts. The first of these phrases, can't help, is always followed by a present participle whereas the others take an infinitive. [c. 1700]

Words nearby can't help

can't abide, can't but, can't complain, can't do anything with, can't fight city hall, can't help, can't hit the broad side of a barn, can't hold a candle to, can't make a silk purse out of a sow's ear, can't make head or tail of, can't punch one's way out of a paper bag