To lose the clear outlines or boundaries of something and become blurry or indistinct. This can refer to visual impressions or colors.
example
Durch den Regen verschwammen die Lichter der Stadt zu bunten Flecken.
Because of the rain, the city lights blurred into colorful patches.
Usage tips
Word structure
The verb is made up of 'ver-' and 'schwimmen' (to swim). You can imagine it visually: the clear outlines 'swim' away and dissolve until they become unclear.
EXAMPLE
Im Nebel verschwammen die Umrisse der Bäume.
In the fog, the outlines of the trees blurred.
Auxiliary verb 'sein'
Since 'verschwimmen' (to blur) describes a change of state, the perfect tense is always formed with the auxiliary verb 'sein' (to be), not with 'haben' (to have).
EXAMPLE
Die Farben auf dem nassen Papier sind ineinander verschwommen.
The colors on the wet paper have blurred into one another.
Typical collocations
In the figurative meaning, 'verschwimmen' (to blur) is very often used with the noun 'die Grenzen' (the boundaries). The phrase 'die Grenzen verschwimmen' (the boundaries blur) is a fixed combination.
EXAMPLE
In ihrem Job verschwimmen die Grenzen zwischen Arbeit und Privatleben oft.
In her job, the boundaries between work and private life often blur.
Compare with
confusable
verschwimmen vs verschwinden
to disappear
'verschwinden' and 'verschwimmen' look very similar, but they do not mean the same thing. You use 'verschwinden' when something is gone, is no longer visible, or no longer exists. 'verschwimmen' means that something becomes indistinct: lines, colors, or differences are no longer clear. Learners may confuse the words because of their similar form. Remember: if something is gone, you say 'verschwinden'. If something is still there but becomes blurry or unclear, you say 'verschwimmen'.
verschwimmen
Ohne Brille verschwimmen die Buchstaben vor meinen Augen.
Without glasses, the letters blur before my eyes.
verschwinden
Im Nebel verschwand das Haus langsam aus unserem Blick.
In the fog, the house slowly disappeared from our view.