Strong's #196: akribestatos (pronounced ak-ree-bes'-ta-tos)
superlative of akribes (a derivative of the same as 206); most exact:--most straitest.
Thayer's Greek Lexicon:
̓́
akribestatos
1) exact, careful
2) of the strictest sect: the most precise and rigorous in interpreting the Mosaic law, and in observing even the more minute precepts of the law and tradition
Part of Speech: adjective
Relation: superlative of akribes (a derivative of the same as G206)
Usage:
This word is used 1 times:
Acts 26:5: "that after the most straitest sect of our religion I lived"