To add to Greg's answer: In English, when a word ends in -ng, the G is not pronounced in most dialects of English (including GA and RP). Rather, only the N is pronounced, but the N is pronounced with the tongue in the same position as for a G (that is, the back of the tongue is raised in the back of the mouth). This sound is IPA /ŋ/. ING is normally pronounced /ɪŋ/, although you may hear /iŋ/ in California. The verb ending -ing is sometimes pronounced /(ə)n/ in rapid speech, but I don’t think this is likely with “beguiling”, since this word is considered to be an adjective in its own right. By the way, the U in “beguiling” is silent, since the word “guile” came into English via French. On more thing — if you’re only now noticing that the G is not pronounced separately in the ending -ng, that tells me that you would really benefit greatly from working on your listening and pronunciation skills, because the way you speak is the way you listen.