彻头彻尾

lit. from head to tail (idiom); thoroughgoing / through and through / out and out / from top to bottom

thorough / penetrating / to pervade / to pass through

head / hair style / the top / end / beginning or end / a stub / remnant / chief / boss / side / aspect / first / leading / classifier for pigs or livestock / CL:個|个[ge4]

suffix for nouns

tail / remainder / remnant / extremity / sixth of the 28 constellations / classifier for fish

horse's tail / pointed posterior section of a locust etc