ugly

ugly /ˈʌgli/ adjective
uglier; ugliest
ugly
/ˈʌgli/
adjective
uglier; ugliest
Britannica Dictionary definition of UGLY
[also more ugly; most ugly]
1 
a  : unpleasant to look at : not pretty or attractive
2 
: offensive or disgusting
3 
: very bad or unpleasant

rear its ugly head

— see 1head

— ugliness

/ˈʌglinəs/ noun [noncount]