לְפִי
Hebrew’s most commonly-used way of saying according to is לפי.
For example:
לפי מה שמופיע על השלט, מותר לחנות פה.
According to what appears (written) on the sign, (we’re) allowed to park here.
לפי – appearing as early as in the Torah itself – is a shortened version of the less common expression, על פי – literally, on the mouth of, where פי is the of version of the word פה – mouth (“the mouth of“).