Words ending with the nasal vowel ã, a diphthong or any letter other than an -a, -e and -o or -as, -es, -os, -am, -em or -ens, are all stressed on the last syllable. Additionally, words that don't contain a letter with an acute accent ( ' ) or circumflex ( ^ ) are all stressed on the last syllable, for example:
 

	peru
	falar
	amanhã
	coração
	maça
	andei
	retorquiu
	usufrui