quin-

From one combining form of Latin quinque (“five”). See, e.g., quindecim.

quin-

1. five

• quinqu-, quinque-
• quintet
• quintuplet
• quincentennial

• pent-, penta-

• “quint-, comb. form”, in OED Online ⁠, Oxford: Oxford University Press, 2022.

• quim- (before a vowel or a consonant which is labial)

quin-

1. Object prefix for verbs; it indicates that the object is third-person plural; them.