有头无尾

to start but not finish (idiom); to fail to carry things through / lack of sticking power / short attention span

(idiom) to fail to finish off what one started

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

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

not to have / no / none / not / to lack / un- / -less

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

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