May I appeal to some kind Pali scholar to help me in analyzing this
word. It comes from the daily evening sa.nghaabhigiiti puja performed
in the Thai tradition.
The entire line is "yo.t.thabbidho ariyapuggalasa.nghase.t.tho"
which is translated as "The field of the Sangha formed of eight kinds
of noble beings" in the Chanting Book from Amaravati monastery,
England.