/kənˈteɪ.dʒəs/
(感情、态度等)感染性的，会迅速蔓延开的；A feeling or attitude that is contagious spreads quickly among a group of people. [usu v-link ADJ]
Laughing is contagious…
笑是有感染力的。
Antonio has a contagious enthusiasm for the beautiful aspect of food.
安东尼奥对食品赏心悦目这一方面的热情非常有感染性。