opaque adj.

1 not clear enough to see through

VERBS be, look | become Add the rice to the pan and cook until it becomes opaque.

ADV. very | completely | almost, nearly | relatively, slightly The glasses looked slightly opaque.

PREP. with The windows were nearly opaque with grime.

2 difficult to understand

VERBS be | become | render sth The complex administrative arrangements render the decision-making process somewhat opaque.

ADV. extremely, very | completely | relatively, slightly, somewhat