a.
1.
Acrid, tasting like wormwood, like gall.
2.
Fierce, savage, cruel, merciless, relentless, virulent, fell, ruthless, dire.
3.
Severe, harsh, stern.
4.
Distressing, painful, grievous, intense, sore, sorrowful, afflictive, poignant, calamitous.
a.
1.
Acrid, tasting like wormwood, like gall.
2.
Fierce, savage, cruel, merciless, relentless, virulent, fell, ruthless, dire.
3.
Severe, harsh, stern.
4.
Distressing, painful, grievous, intense, sore, sorrowful, afflictive, poignant, calamitous.
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012