ul·te·ri·or 
/ˌʌlˈtirijɚ/ adjective
/ˌʌlˈtirijɚ/ adjective : kept hidden in order to get a particular result
▪ I think she has an ulterior motive for helping us. [=she has a secret reason for wanting to help us]
▪ I think she has an ulterior motive for helping us. [=she has a secret reason for wanting to help us]
