This is the 8340th most frequent German word.
kacheln
"To tile" or "to cover with tiles."
Here, 'kacheln' means to apply tiles to a surface, such as a wall or floor, hence its usage as a verb referring to tiling.
Gestern haben wir die Küche neu gekachelt.
Yesterday we retiled the kitchen.
In this sentence, 'Kacheln' refers to the actual tiles used in decoration or construction, showcasing its noun form.
Der Boden in diesem Raum wurde mit schönen Kacheln gestaltet.
The floor in this room was decorated with beautiful tiles.
This usage is metaphorical and idiomatic, deriving from the notion of 'kacheln' as to accelerate or make progress, commonly seen in colloquial or gaming contexts for creating leads or making advances.