This is the 33rd most frequent Latvian word.
tas
"That" or "it" (demonstrative pronoun).
Here, 'tas' is used as a demonstrative pronoun to indicate a specific item.
Tas ir mans telefons.
That is my phone.
Here, 'tas' functions as a pronoun to point to a specific subject being asked about.
Vai tas ir tavs suns?
Is that your dog?
In this case, 'tas' refers to an abstract concept or idea previously mentioned or implied.