The common man hears this word and thinks it means something is odd or strange. The educated man realizes there is a context in which there may be a peculiar meaning.
Indeed, those who study the origin and meaning of words note that in the early 1700s the word ‘peculiarly’ took on the meaning of a quality or characteristic unique to an individual or group. Thus, the Initiate is being told that certain excellences of character are expected of a Mason, because he is a Mason.
These attributes may be found in others, but the charge to the new Mason provides esoteric knowledge that is unique — or peculiar — to our Fraternity.