shame ‧ ful /ˈʃeɪmf ə l/ BrE AmE adjective
[ Word Family: noun : ↑ shame , ↑ shamefulness , ↑ shamelessness ; adjective : ↑ ashamed ≠ ↑ unashamed , ↑ shameful , ↑ shameless ; verb : ↑ shame ; adverb : ↑ shamefully ≠ ↑ shamelessly ]
shameful behaviour or actions are so bad that someone should feel ashamed:
It’s shameful the way some people treat their pets.
a shameful family secret
—shamefully adverb
—shamefulness noun [uncountable]