difficulty (EN)
nom

nom “difficulty”

sg. difficulty, pl. difficulties or uncountable
  1. difficulté
    The heavy snowfall was a major difficulty in reaching the summit of the mountain.
  2. degré de difficulté (pour préciser qu'il s'agit du niveau de challenge ou d'effort nécessaire)
    The difficulty of the puzzle increased with each level, challenging even the most experienced players.