triasis

"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".

Triasis is not necessarily meant for using in sentence. At least in Bengali. However you can refer some one as "ত্রিয়াশিসধন্য" which means someone who is blessed by those three deities.