(transitive, idiomatic) To notice, observe, learn, or understand, especially something otherwise overlooked.

Third-person singular simple present indicative form of filter up

(idiomatic) Of information, knowledge or practice; to move slowly up to other levels of an organisation, or population.

present participle of filter up

(idiomatic, informal) To be friendly toward (with or to) someone, especially in an ingratiating way; to form a friendship (with).

simple past tense and past participle of filter up

(intransitive, UK dialectal, Northern England) Suffering from any affection of the throat or chest which renders the voice hoarse.

upward and downward, alternately / (idiomatic) alternately forwards and backwards along a path / (idiomatic) staunchly, unwaveringly, obstinately / In various places, e.g. in a country.

(nautical) Vertical; perpendicular; said of the cable when the anchor is under, or nearly under, the hawse hole, and the cable is taut. / plain; downright

Alternative form of messed up