also: ななにん
noun
seven people
Simple counter for seven persons. Both readings しちにん and ななにん are used; ななにん is often preferred in speech to avoid confusion with 一人 (ひとり) or 四人 (よにん).
七人の侍
Seven Samurai
この部屋には七人います。
There are seven people in this room.
Compound of 七 (seven) and 人 (person). The reading しちにん uses the on'yomi of both characters, while ななにん uses the native Japanese numeral なな.