Definition of sad-iron in English:

sad-iron

noun

historical
  • A solid iron for smoothing clothes.

    • ‘People buy old-fashioned sad-irons not to iron their clothes with, but to use as bookends or doorstops.’
    • ‘This is a rare sized sad-iron that was used by a small child so that she or he could ‘iron’ along with the mother.’

Origin

Mid 18th century: from sad, in the obsolete sense weighty.