four

Concise Oxford English Dictionary © 2008 Oxford University Press:
four/fɔː(r)/

▶cardinal number

• 1 equivalent to the product of two and two; one more than three, or six less than ten; 4. (Roman numeral: iv or IV, archaic iiii or IIII)

• 2 Cricket a hit that reaches the boundary after first striking the ground, scoring four runs.

• 3 a four-oared rowing boat or its crew.

  ■ (fours) a race for such boats.

– derivatives
fourfold adjective & adverb.

– origin OE fēower, of Gmc origin.