Antonyms of adj low-pressure

1 sense of low-pressure

Sense 1
low-pressure -- (not forceful; "a low-pressure salesman"; "a low-pressure campaign")

INDIRECT (VIA unaggressive) -> aggressive -- (having or showing determination and energetic pursuit of your ends; "an aggressive businessman"; "an aggressive basketball player"; "he was aggressive and imperious; positive in his convictions"; "aggressive drivers")

Similarity of adj low-pressure

1 sense of low-pressure

Sense 1
low-pressure -- (not forceful; "a low-pressure salesman"; "a low-pressure campaign")
       => unaggressive (vs. aggressive), nonaggressive -- (not aggressive; not given to fighting or assertiveness)