Thickest

Late in the autumn, when the weather was rough, windy, and wet, and the cold penetrated through the thickest clothing, especially at sea, a wretched boat went out to sea with only two men on board.

Only the thickest trunks could serve as firewood.

I cut the thickest trunks for firewood.

Leonid was in the thickest part of the bushes.