simple past tense and past participle of pass as

plural of by-pass

(education, attributive) A type of grading system where a student either passes or fails a class, and no specific grade (such as A, B or C) is given.

(intransitive) To move or be moved from one place to another. / (transitive) To go past, by, over, or through; to proceed from one side to the other of; to move past.

An opening, road, or track, available for passing; especially, one through or over some dangerous or otherwise impracticable barrier such as a mountain range; a passageway; a defile; a ford.

(computing, slang) A password (especially one for a restricted-access website).

A surname.

To go forward. / To convey or communicate. / To transfer (something) to someone, especially by handing or bequeathing it to the next person in a series. / To skip or decline.

present participle of pass

That passes away; ephemeral. / (now rare, literary) Pre-eminent, excellent, extreme. / Vague, cursory. / Going past.