This is the 277th most frequent Estonian word.
parim
"Parim" means "best" in English.
"Parim" functions as an attributive adjective describing "sõber" (friend), identifying an individual with superior qualities in supportiveness.
Parim sõber on alati toeks.
The best friend is always there to support.
"Parimat" is the partitive case of "parim," indicating the search for a superlative noun (solution) in a specific context.
Ma otsisin parimat lahendust probleemile.
I was looking for the best solution to the problem.
Here, "parim" functions as a superlative adjective modifying "päev" (day), to indicate the highest quality among all days.