1. barbarous, brutal, cruel, fell, roughshod, savage, vicious

(of persons or their actions) able or disposed to inflict pain or suffering

Example Sentences:
'a barbarous crime'
'brutal beatings'
'cruel tortures'
'Stalin's roughshod treatment of the kulaks'
'a savage slap'
'vicious kicks'

• barbarous
• cruel
• fell
• roughshod
• savage
• vicious

2. brutal, unrelenting

harsh

Example Sentences:
'the brutal summer sun'
'a brutal winter'

• unrelenting

3. beastly, bestial, brutal, brute, brutish

resembling a beast; showing lack of human sensibility

Example Sentences:
'beastly desires'
'a bestial nature'
'brute force'
'a dull and brutish man'
'bestial treatment of prisoners'

• beastly
• bestial
• brute
• brutish

4. brutal

disagreeably direct and precise

Example Sentences:
'he spoke with brutal honesty'