
komisch
funny
Funny, amusing, and making people laugh.
Er hat einen komischen Hut auf, über den alle lachen mussten.
He's wearing a funny hat that made everyone laugh.
funny / strange
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funny
Funny, amusing, and making people laugh.
Er hat einen komischen Hut auf, über den alle lachen mussten.
He's wearing a funny hat that made everyone laugh.

strange
Strange, odd, or unusual.
Das Auto macht seit gestern ein komisches Geräusch.
The car has been making a strange noise since yesterday.

to feel strange
To feel physically or emotionally unwell, strange, or not quite healthy.
Mir ist irgendwie komisch, ich setze mich lieber mal hin.
I feel kind of strange; I'd better sit down for a bit.
The meaning of 'komisch' (funny/strange) depends heavily on the context. If it refers to something that makes you laugh, such as a joke, it means 'funny'. If it describes something unexpected or hard to understand, such as a noise, it means 'strange'.
Der Clown machte ein komisches Gesicht und alle lachten.
The clown made a funny face and everyone laughed.
To express that someone feels unwell, the fixed structure 'jemandem ist komisch' (someone feels strange) is used. The person who feels unwell is always in the dative.
Mir ist plötzlich ganz komisch, ich glaube, ich brauche frische Luft.
I suddenly feel really strange; I think I need some fresh air.
In the meaning 'seltsam' (strange), 'komisch' (strange) is often combined with nouns such as 'Gefühl' (feeling), 'Geräusch' (noise), 'Zufall' (coincidence), or 'Typ' (guy/person).
Seit dem Update verhält sich mein Computer komisch.
Since the update, my computer has been behaving strangely.
funny
Lustig and komisch can both mean “funny,” but both can also refer to something unusual. Lustig tends to express an amused reaction, whereas komisch is more readily understood as strange. The context must therefore show whether someone is laughing or finds something odd.

Seine unerwartete Antwort war komisch, und alle wurden plötzlich unsicher.
His unexpected answer was strange, and everyone suddenly felt unsure.
Seine unerwartete Antwort war lustig, und alle mussten lachen.
His unexpected answer was funny, and everyone had to laugh.