Italian edit

Alternative forms edit

Etymology edit

Literally, hard bone.

Noun edit

osso duro m (plural ossi duri)

  1. (idiomatic) tough cookie, tough biscuits
  2. (idiomatic) tall order
  3. Used other than figuratively or idiomatically: see osso,‎ duro.

Portuguese edit

Noun edit

osso duro m (plural ossos duros)

  1. (idiomatic) tough cookie (person who can endure physical or mental hardship)
  2. Used other than figuratively or idiomatically: see osso,‎ duro.