Rule reminder

Synonyms of 'importante': 'fondamentale' (fundamental, essential), 'cruciale' (crucial — decisive moment/factor), 'determinante' (determining, decisive), 'rilevante' (relevant/significant), 'significativo' (significant), 'essenziale' (essential), 'primordiale' (primordial — very formal). Synonyms of 'difficile': 'arduo' (arduous — formal/written), 'complesso' (complex), 'impegnativo' (demanding, challenging), 'ostico' (tricky, tough — colloquial-formal), 'spinoso' (thorny — figurative), 'delicato' (delicate — sensitive/tricky).