tread verb

ADV. heavily He came down the stairs, treading as heavily as he could. | gently, lightly, softly | carefully, gingerly, warily She trod gingerly. It would be risky to hurry. (figurative) The government will have to tread carefully in handling this issue. | down She planted the seeds and trod the earth down.

PREP. in Billy trod in a big puddle. | into Some cake crumbs had been trodden into the carpet. | on Be careful not to tread on the flowers.