sangha

Those on the path of knowing.
Also, more strictly speaking, those on the same path as yourself. And even more strictly speaking, refers to monastics who are formally part of a traditional organisation.

One of the Three Refuges: The Buddha, the Dharma, and the Sangha.

tathāgata

The Buddha – “thus gone” – “arrived at suchness (reality beyond definition)” – “thus in being”

tatha – truth; reality; being
gata – gone; rooted in

https://en.wikipedia.org/wiki/Tath%C4%81gata
https://buddhism.stackexchange.com/questions/1629/why-does-the-buddha-call-himself-the-tath%c4%81gata

dāna

Dāna is a Sanskrit and Pali word that connotes the virtue of generosity, charity, or giving in Indian philosophies; the inclination to give, without expecting anything in return.

( pi, sa: dāna दान )

Dana: The Practice of Giving – Selected essays edited by Bhikkhu Bodhi, 1995
https://accesstoinsight.org/lib/authors/various/wheel367.html