seltener
Translation
rarer, less frequent, more seldom
Examples
Solche Vögel sind hier seltener als früher.
Such birds are rarer here than before.
Das ist ein seltenerer Fall von Grippe.
This is a rarer case of the flu.
Grammar Patterns
((Adjective)) + than ... rarer than ... This flower is seltener than that one.
Similar Words
Synonyms: ungewöhnlicher (more unusual); Antonyms: häufiger (more frequent), öfter (more often)
Etymology
Comparative form of the adjective 'selten' (rare, seldom). The '-er' ending marks the comparative.
Memory Tips
It's the comparative of 'selten', which sounds like the English 'seldom'. Just add '-er' for 'more seldom' or 'rarer'.