lay to
v.
1. To give the blame or credit to; to name as cause.
He was unpopular and when he made money, it was laid to his dishonesty, but when he lost money, it was laid to his stupidity.
Compare: LAY AT ONE'S DOOR.
2. To hold a ship or boat still against the wind.
The pirates decided to lay to that night and go ashore in the morning.
Compare: LIE TO.
3. To exert oneself; to work hard.
He picked up a shovel and laid to with the rest of the gang.

[TahlilGaran] English Idioms Dictionary ▲