This is the 265th most frequent Tamil word.
ல
The Tamil letter "ல" represents the consonant sound "la" in the Tamil script.
Here, 'ல' (in 'பாடலுள்') indicates the locative case, specifying 'in the song'.
அவன் பாடலுள் தொலைந்து போகிறான்.
He gets lost in the song.
In this sentence, 'ல' (in 'கல்வியில்') expresses the domain or area of interest, namely 'in education'.
கல்வியில் அவர் மிகுந்த ஆர்வம் கொண்டவர்.
He is deeply interested in education.
In this context, 'ல' combines with 'இல்' to specify location, represented here as 'on the tree'.