An air-shaft is a vertical or inclined passage that provides ventilation to underground areas. The crossword solutions for the term air-shaft are VENT (4 letters), ISAAC (5 letters), UPCAST (6 letters), CAM (3 letters), and BEAM (4 letters). VENT is a noun meaning an opening in a wall or roof that allows air to enter or escape. ISAAC is a proper noun referring to the Old Testament figure who was the son of Abraham and Sarah. UPCAST is a verb meaning to throw or cast something upwards. CAM is a noun referring to a rotating or sliding piece in a mechanical linkage used to convert rotary motion into linear motion. BEAM is a noun meaning a long, sturdy piece of timber or metal used in construction.