qualvoll
agonizing
Associated with great physical or emotional pain and suffering; extremely painful.
Nach dem Unfall hatte er qualvolle Schmerzen im Bein.
After the accident, he had agonizing pain in his leg.

agonizing
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agonizing
Associated with great physical or emotional pain and suffering; extremely painful.
Nach dem Unfall hatte er qualvolle Schmerzen im Bein.
After the accident, he had agonizing pain in his leg.

The adjective is made up of the noun 'die Qual' (agony, torture) and the suffix '-voll' (-ful). So it literally means 'full of agony'.
Die letzten Kilometer des Marathons waren ein qualvoller Kampf gegen die Erschöpfung.
The last few kilometers of the marathon were an agonizing battle against exhaustion.
'Qualvoll' (agonizing) is a very strong and emotional word. It is used only for extreme suffering or very unpleasant situations, not for everyday pain or minor inconveniences.
Der Abschied von seiner Familie war ein qualvoller Moment für ihn.
Saying goodbye to his family was an agonizing moment for him.
In its literal meaning, 'qualvoll' (agonizing) is often combined with nouns that describe suffering, pain, or the end of life. Common combinations are 'qualvolle Schmerzen' (agonizing pain), 'ein qualvoller Tod' (an agonizing death), or 'qualvolle Erinnerungen' (painful memories).
Er litt unter den qualvollen Folgen seiner schweren Krankheit.
He suffered from the agonizing effects of his serious illness.
In the figurative sense, 'qualvoll' (agonizing) describes processes that are extremely slow, difficult, or unpleasant. Typical examples are 'eine qualvolle Wartezeit' (an agonizing wait), 'eine qualvolle Stille' (an agonizing silence), or 'ein qualvoll langweiliger Film' (an agonizingly boring film).
Es war eine qualvolle Stille im Raum, nachdem er die schlechte Nachricht überbracht hatte.
There was an agonizing silence in the room after he delivered the bad news.
pleasant
'angenehm' and 'qualvoll' are clear opposites when talking about experiences and feelings. 'angenehm' means that something feels good or is easy to bear. 'qualvoll' means that something involves severe pain, great suffering, or very great effort. It can refer to physical pain, but also be used figuratively, for example for a long wait or a very difficult task. 'qualvoll' is much stronger than just 'unangenehm' (unpleasant).

Das lange Warten auf die Nachricht war für die Familie qualvoll.
The long wait for the news was agonizing for the family.
Die Fahrt im leeren Zug ist heute sehr angenehm gewesen.
The ride on the empty train was very pleasant today.