I. ˈhärn noun
( -s )
Etymology: Middle English hernes, harnes (plural), of Scandinavian origin; akin to Old Norse hjarni brain; akin to Old High German hirni brain, Middle Dutch hersene brain, Old Norse hjarsi crown of the head — more at cerebral
chiefly Scotland : brain : brains — usually used in plural
II. noun
( -s )
Etymology: by contraction
: harden II