Gardiner sign listed no. U21 is a portrayal of the adze on block has the Egyptian language value of stp and is the verb "choose". It is used as a determinative in 'stp', "cut into pieces" and as an ideogram for 'stp', "choose", "choice".
Lacking of understanding, Gardiner saw the hieroglyph language value stp as 'an adze on block of wood' in place of real distillation instrument. The hieroglyph and its language value is based on Sanskrit word Soo-tp-r-m lwRije, which mean 'a distillation of spirituous liquor, a dipper, purification, sucker. The word Soo-tp-r-m is extension of 'Su-t', which means 'poured out, extracted, expressed, begotten produce, brought forth and su-t-h lwRk% means 'a son, a king'