harm, injury
害 centers on damage or negative impact: harm and injury. It covers both physical hurt and broader detrimental effects.
害 is thought to combine 宀 (roof) with 口 (mouth) and 土 (earth), but the exact historical development is uncertain. One traditional view interprets it as a roof covering a mouth that speaks harm, though this is speculative.
Under a roof 宀, a harmful mouth 口 spreads injury like dirt 土 piling up. The whole scene shows harm being done.
For ガイ, imagine a guy causing harm under the roof: guy -> ガイ, and his actions bring injury.
—
(suffering) damage; injury; harm
obstacle; impediment; hindrance; barrier; difficulty
calamity; disaster; misfortune
killing; murder
damage; injury; loss
obstruction; hindrance; blocking; disturbance; interference; interruption; sabotage; jamming (a signal)
infringement; violation; invasion; encroachment; trespass
injury; harm; evil influence; damage
harmful; hazardous
obstruction; impediment; hindrance; inhibition; blocking; check
injury; inflicting bodily injury
persecution; oppression
advantages and disadvantages; interests (of parties)
harmful insect; noxious insect; pest; vermin
injury; harm; danger
harmless
pollution; public nuisance; contamination
harmful effect; harmful influence; evil practice; abuse; malady
to injure; to damage; to harm; to hurt
water damage; flood disaster
harmful side effects of a medicine or drug
cold-weather damage (to crops)
interests; stake
perpetrator; wrong-doer; aggressor; assailant; offender; at-fault party (e.g. in an accident)
non-life insurance; general insurance; property and casualty insurance
restitution; damages; indemnity; compensation
mental disorder; mental disability; mental illness
victim; injured party; sufferer
(physically) disabled person; person with a physical disability
disabled person; person with a (physical or mental) disability