"ত্রিয়াশিস"
In Bengali 'ত্রি-' or 'Tri-' means three and 'আশিস' or 'ashish' means
blessings.
"Blessing of three deities".
Conventionally it is assumed that these refers to
the three primitive deities of hindu
mythology. "Brahma";"Vishnu" and "Maheshwara".