heinous

Mane (Îngilîzî)

1. Totally reprehensible.
2. Bad, evil or villainous.

Hevwate

atrocious

treacherous

monstrous

flagitious

wicked

diabolic

inhuman

fiendish

abominable

serious

horrible

depraved

grave

🪦

execrable

outrageous

frightful

grievous

grisly

gross

heavy

hideous

horrific

ignorant

important

mean

messed up

nefarious

offensive

sinister

stupid

treasonous

tricky

ugly

very serious

vile

villainous

weighty

intoreable

fiendich

amoral

barbarous

base

bastardly

beastly

criminal

cruel

detestable

devious

dodgy

fell

Werger

atroce

abscheulich

atroz

odioso

atroz

empio

abominável

Gottlosigkeit

hediondo

αποτρόπαιος

απεχθής

στυγερός

ruchlos

afschuwelijk

Ruchlosigkeit

Wekî (IPA) tê bilêvkirin

/ˈheɪnəs/

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: hainous

Hevwate bi fransî: haineux

Hevwate bi Old French: enhadir

In summary

From Middle English hainous, from Old French haïneus (compare French haineux) from haïr (“to hate”), hadir (“to hate”) (compare Old French enhadir (“to become filled with hate”)), from Frankish *hattjan (“to hate”)
The fluctuation between pronunciations with /eɪ/ and /iː/ is old; the former reflects adoption of an unmonophthongised pronunciation of Old French -ai-, while the latter reflects a monophthongised form.