arousal

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++a·rous·al /əˈraʊzəl/ noun [uncountable]  SEX/HAVE SEX WITHexcitement, especially sexual excitement 唤起；〔尤指性欲的〕激起

Examples from the Corpus

arousal• These findings add considerable weight to the claims that emotional arousal is of causal significance to relapse.• He wasn't unmoved either, and his slow arousal against her made her arch into him.• The creative advertiser has the function of stimulating arousal in buyers.• Feeling his swift arousal, she dragged her mouth from his to bury it against his warm neck.

a·rous·al nounChineseSyllable  

Corpus excitement especially sexual excitement,

arousal
a‧rous‧al /əˈraʊzəl/ noun [uncountable]
excitement, especially sexual excitement