[Middle English hasard, dice game, from Old French, possibly from Old Spanish azar, possibly from Arabic az-zahr, the gaming die : al-, the + zahr, gaming die.]

hazard

1167, from O.Fr. hasard “game of chance played with dice,” possibly from Sp. azar “an unfortunate card or throw at dice,” which is said to be from Arabic az-zahr (for al-zahr) “the die.” But this is doubtful because of the absence of zahr in classical Arabic dictionaries. Klein suggests Ar. yasara “he played at dice;” Ar. -s- regularly becomes Sp. -z-. The -d was added in Fr. in confusion with the native suffix -ard. Sense of “chance of loss or harm, risk,” first recorded 1548; the verb sense of “put something at stake in a game of chance” is from 1530. Hazardous in the sense of “perilous” is from 1618.