This is the 440th most frequent Tamil word.
பலம
Strength.
Here, "பலம" (usually transliterated as 'balam') means 'strength' or physical power.
அவருடைய பலம் மிகுந்தது.
His strength is immense.
In this context, "பலமாக" (a derivative of 'balam') implies 'powerfully' in an intellectual or forceful manner.
பலமாக சிந்திக்க வேண்டும்.
We must think powerfully.
In this example, "பலமான" (associated with 'balam') signifies 'strong' or having robustness.