歯が立たない

はがたたない

unable to compete with; not able to make a dent in (e.g. a problem); not able to get a solid hit in (e.g. in a fight); hard to chew

Also written 歯がたたない

Meaning

expadj-i
unable to compete with; not able to make a dent in (e.g. a problem); not able to get a solid hit in (e.g. in a fight)
expadj-i
hard to chew

Example sentences

この問題は難しくて私には歯がたたない。

This problem is beyond my powers.
この兵器では歯が立たない。

This weaponry is no match for it.