is math le

Literally ‘X is good with Y’ for ‘Y likes X’. The idiom goes back to Old Irish is maith la.

is math le

1. like, be fond of

   Is math leam sin fhaicinn. ― I like to see that.

   mas math leat ― if you like

• Also used in the conditional tense ("I would like"): see bu mhath le.