IELTS Vocabulary English Vocabulary Lesson 31 IELTS Exams Preparation 311-Daunting (Adj)  Definition: seeming challenging   Synonyms: disconcerting, unnerving, intimidating, formidable, unsettling  Usage: The daunting task of raising seven girls. 312-Arduous (Adj)  Definition: involving or requiring strenuous effort; difficult and tiring.  Synonyms: onerous, taxing, complex, challenging, laborious, burdensome, heavy.  Usage: They were now faced with an arduous journey … Continue reading IELTS Vocabulary English Vocabulary Lesson 31 IELTS Exams Preparation