naha
In Ranidu Lankage's Herda Kiniththuwa Haduwe
Ranidu uses the word in a more modern, romantic sense. Here
සතපනවා suggests:
- comforting someone emotionally
- holding someone close
- bringing peace to their heart
- sometimes even resting in someone's embrace
So the meaning is metaphorical rather than literal.
In Milton Mallawarachchi's Awasara Natha Mata
The lyric says:
"ඔබ කැඳවන්නට, ඔබ සතපන්නට, මා හද තුළ ඉඩ නැතිව නොවේ."
Here,
"ඔබ සතපන්නට" doesn't mean merely "to put you to sleep." It means:
"to give you comfort," "to let you rest in my heart," "to care for you lovingly."
The singer is saying that his heart has plenty of room to love and comfort her, but circumstances prevent him from doing so.