冴える[saeru] to be clear (of a sight, sound, colour, etc.)
冴え輝く[saekagayaku] to shine clearly
冴え行く[saeyuku] to clear gradually
冴え冴えした[saezaeshita] cheerful (look)
冴え冴えとした[saezaetoshita] cheerful (look)

冴え渡る[saewataru] to get cold
冴返る[saekaeru] to be very clear
頭の冴え[atamanosae] bright intelligence
腕の冴え[udenosae] dexterity

データの先頭[deetanosentou] beginning of data
一頭[ittou] one large animal (horses, cattle, etc.)
一頭立て[ittoudate] one-horse (carriage)
咽頭[intou] pharynx
駅頭[ekitou] station

音頭[ondo] leading a group of people
会頭[kaitou] society president
街頭[gaitou] in the street
核弾頭[kakudantou] nuclear warhead
巻頭[kantou] opening page of book