noun
inexperienced person; young person; novice; greenhorn
A somewhat formal or self-deprecating term for someone who is young and inexperienced. Often used in humble contexts or when referring to one's own lack of experience.
若輩者ですが、よろしくお願いします。
I am still inexperienced, but I look forward to working with you.
彼はまだ若輩者だから、大きな仕事は任せられない。
He is still a greenhorn, so we can't entrust him with big tasks.
Compound of 若輩 (young/inexperienced) + 者 (person). The exact historical derivation is uncertain, but the spelling is conventionally associated with youth and inexperience.