Competitively

Caffeine is a purinergic antagonist that competitively inhibits adenosine at the sites of P1 receptors.

The bonspiel was for people who curl competitively.

To play chess competitively according to the international rules of FIDE, a player must write down his moves.

For example, kalicludin 1-3 from A. sulcata binds competitively to Kv1.2 channels to paralyse the prey rapidly.