Ma'anar ƙamus na kalmar "numfashi" ita ce fitarwa ko sakin iska daga huhu ta hanci ko baki, sau da yawa a matsayin wani ɓangare na tsarin numfashi. Kishiyar “numfashi” wanda ke nufin aikin shaka ko shan iska a cikin huhu. Har ila yau, a wasu lokuta ana amfani da “Numfashi” a alamance don sakin jiki ko barin motsin rai ko tashin hankali, kamar lokacin da aka shawarci wani ya “numfasa da numfashi a hankali” don samun nutsuwa ko huta.