
verschlimmern
to worsen
To make an already bad situation, condition, or problem even worse.
Durch das Kratzen hat er seine Hautentzündung nur noch verschlimmert.
By scratching, he only worsened his skin inflammation.
to worsen
Loading your saved state.

to worsen
To make an already bad situation, condition, or problem even worse.
Durch das Kratzen hat er seine Hautentzündung nur noch verschlimmert.
By scratching, he only worsened his skin inflammation.

to get worse
To become worse; to develop negatively.
Trotz der Medikamente hat sich sein Zustand über Nacht verschlimmert.
Despite the medication, his condition got worse overnight.
The word is derived from 'schlimmer' (worse), the comparative of 'schlimm' (bad/serious). The inseparable prefix 'ver-' here expresses a change into a negative state, meaning 'to make worse.'
Jede falsche Bewegung könnte seine Verletzung verschlimmern.
Any wrong movement could worsen his injury.
There are two uses: 'etwas verschlimmern' (to worsen something) is transitive and means that someone or something makes a situation worse. 'Sich verschlimmern' (to get worse) is reflexive and means that a condition becomes worse on its own.
Sein Schweigen verschlimmerte die Situation nur.
His silence only worsened the situation.
When the verb is used transitively, typical objects are abstract nouns such as 'die Lage' (the situation), 'die Situation' (the situation), 'ein Problem' (a problem), 'einen Konflikt' (a conflict), or 'eine Krankheit' (an illness).
Mit seiner unüberlegten Aussage hat er den Konflikt nur noch verschlimmert.
With his thoughtless statement, he only worsened the conflict.
In the reflexive use, typical subjects are things whose condition changes, for example 'das Wetter' (the weather), 'die Krankheit' (the illness), 'der Zustand' (the condition), or 'die Schmerzen' (the pain).
Ihre Kopfschmerzen haben sich über Nacht verschlimmert.
Her headaches got worse overnight.
to strengthen / reinforce / amplify
Both verbs can be used with pain, discomfort, or symptoms. Verstärken mainly emphasizes that something becomes more intense, while verschlimmern means making an already bad situation or condition even worse. Use verstärken for greater intensity and verschlimmern for the overall negative development.

Das grelle Licht verschlimmerte meinen ohnehin schlechten Zustand.
The glaring light worsened my already poor condition.
Das grelle Licht verstärkte meine Kopfschmerzen.
The glaring light intensified my headache.