wicket

(noun) cricket equipment consisting of a set of three stumps topped by crosspieces; used in playing cricket.

(noun) a small arch used as croquet equipment. Synonyms: hoop.

(noun) small gate or door (especially one that is part of a larger door). Synonyms: wicket door, wicket gate.

(noun) small opening (like a window in a door) through which business can be transacted. Synonyms: lattice, grille.