This is the 316th most frequent Tamil word.
ஊக
Assumption or guess.
In this sentence, "ஊக" is used as a noun meaning "guess."
நான் இந்த விடையின் ஊகத்தை செய்தேன்.
I made a guess about this answer.
Here, "ஊக" indicates assumptions or speculations which are considered accurate.
உன்னுடைய ஊகங்கள் எப்போதும் பொருத்தமாக இருக்கின்றன.
Your assumptions are always accurate.
In this context, "ஊகித்தேன்" (derived from "ஊக") is used as a verb meaning "assumed" or "supposed."