bù zú
insufficient
lacking
deficiency
not enough
inadequate
not worth
cannot
should not
bǔ zú
to bring up to full strength
to make up a deficiency
to fill (a vacancy, gap etc)
měi yī gè rén dōu yǒu měi zhōng bù zú de dì fang
However excellent, everyone has his defects.
There is always a fly in the ointment.
cf idiom 美中不足[měi zhōng bù zú], everything is fine except for one small defect
bù zú
ambulatory leg (of a crab, lobster, spider etc)