noun
family members; insiders; close associates
Refers to people within one's own close circle, such as family, relatives, or a trusted in-group. Often used when contrasting with outsiders.
内輪同志で集まって、ささやかな食事会を開いた。
We gathered as close family and friends and held a small dinner party.
この話は内輪同志だけの秘密にしておいてください。
Please keep this story a secret just among us insiders.
Compound of 内輪 (uchiwa, 'family circle; private') and 同志 (dōshi, 'comrades; fellows'). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'fellow insiders.'