阻止 （ソシ） obstruction, check, hindrance, prevention, impediment, interdiction, preemption, blocking

阻害 （ソガイ） obstruction, impediment, hindrance, inhibition, blocking, check

悪阻 （オソ） morning sickness, hyperemesis gravidarum

妊娠悪阻 （ニンシンオソ） hyperemesis gravidarum, HG, severe morning sickness

阻む （はばむ） to keep someone from doing, to stop, to prevent, to check, to hinder, to obstruct, to oppose, to thwart