This is the 14424th most frequent German word.
klarem
"Klarem" is not a standard German word and might be a misspelling or archaic usage. If you meant "klarem" as a form of "klar" (clear), it could mean "to clear" or "clear" depending on the grammatical context.
Here, 'klarem' modifies 'Wasser' (water) and describes its quality as 'clear' (free from impurities), using dative case after 'mit'.
Ich trinke ein Glas mit klarem Wasser.
I am drinking a glass with clear water.
The related noun form 'klare' (adjective form without inflection) describes 'Vorstellung' (idea) in nominative case, indicating clarity of thought.
Nach dem Gespräch habe ich jetzt eine klare Vorstellung.
After the conversation, I now have a clear idea.
The adjective 'klar' here describes 'Argument' (argument) directly, showing clarity in meaning.