pritiskati

1. to press; to push down
   Stalno pritiska dugme za lift, kao da će brže doći. — He keeps pressing the lift button as if it will come faster.
   Pritiskaj ranu dok ne prestane da krvari. — Keep pressing on the wound until it stops bleeding.
2. (on a person) to pressure; to put pressure on
   Roditelji ga pritiskaju da upiše medicinu. — His parents are pressuring him to study medicine.
3. (of worries, grief) to weigh down; to oppress
   Brige oko kredita ga stalno pritiskaju. — Worries about the loan constantly weigh on him.

For a single press the perfective pritisnuti is usually used.