ask, inquire, enquire -- (inquire about; "I asked about their special today"; "He had to ask directions several times")
wonder, inquire, enquire -- (have a wish or desire to know something; "He wondered who had built this beautiful church")
investigate, inquire, enquire -- (conduct an inquiry or investigation of; "The district attorney's office investigated reports of possible irregularities"; "inquire into the disappearance of the rich old lady")