A₁I₁R₁P₃R₁O₁O₁F₄

13 points

AIRPROOF is validvalid

to make impermeable to air [v AIRPROOFED, AIRPROOFING, AIRPROOFS]

57,638 of 196,601 in NWL2023·also valid in CSW24

to make impermeable to air [v -ED, -ING, -S]

4,759 of 280,887 in CSW24·also valid in NWL2023