[gru.el.ing] or gru.el.ling adj [fr. prp. of obs. gruel (to exhaust)] (1852): trying or taxing to the point of exhaustion: punishing "a ~ race" -- gru.el.ing.ly adv
GRUELING
Meaning of GRUELING in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012