Prithee
is not a normal word, it is a portmanteau word
Pray + thee = prithee
It is mean
please
E.g.:
Prithee, say on
Prithee, go in thyself
First Known Use of prithee was in 1560
although, it was known since just Less than 500 years ago , it is considered as an archaic word now
Now prithee write it in a sentence
. See you in another post