(meteorology) cold front

sudden, sharp, precipitous, abrupt

air temperature, atmospheric temperature, ambient temperature

passage through an object / passage of a test in school / passage of a bill / passage through a screening

pass through something / pass a test / pass a bill / pass a screening

to hang (down) / to fall, descend / to stand back; to withdraw

descend / hand down an order, issue, sentence / surrender / have diarrhea

behind, after

(spatially) the back, the rear, behind / (temporally) later, afterwards, some time after the present / the rest

one's backside / the back, the rear (both spatially and temporally)