Gate

gate

(in an air terminal)

gate

((electronics) name of one terminal of a transistor)

grind

(door-like structure outside)

grind

(doorway, opening, or passage in a fence or wall)

grind

(computing: logical pathway)

grind

((electronics) name of one terminal of a transistor)

port

(door-like structure outside)

port

(doorway, opening, or passage in a fence or wall)