‘Moisten’ is related to ‘Drench’ in the same way as ‘Prick’ is related to:

Stab

‘Moisten’ is related to ‘Drench’ in the same way as ‘Prick’ is related to ..

The logic followed here is :

Moisten is to wet slightly

And Drench is to wet throughly or soak

Similarly

Prick is to make hole in something with as harp point

Stab is to thrust Weapon into somebody so as to wound or kill