frustrante
/fɾusˈtɾante/ · B2 · adj
frustrating
😤 frustrante = frustrate + -nte (the 'ing' ending): frustrating
From Latin frustrari, 'to deceive, thwart'. The Spanish adjective ending -nte works like English -ing, so frustrante is just 'frustrat-ing'. Nearly identical to English, so the spelling carries the meaning.