platonic
adjective uk/pləˈtɒn.ɪk/ us/pləˈtɑː.nɪk/
（恋爱或感情）纯精神而无性爱的，柏拉图式的
A platonic relationship or emotion is loving but not sexual.
She knew he was attracted to her, but preferred to keep their relationship platonic. 她知道他喜欢她，但她更愿意与他保持纯友谊的关系。