artful(exhibiting or using much art or skill, see also: dexterous; skilful) adjective [UK: ˈɑːt.fl̩] [US: ˈɑːrt.fl̩]
clever [cleverer, cleverest](things showing inventiveness or originality) adjective [UK: ˈkle.və(r)] [US: ˈkle.vər]I am so clever that sometimes I don't understand a single word of what I am saying. = Yo soy tan ingenioso que a veces no entiendo ni una sola palabra de lo que estoy diciendo.
cunning(skillful) adjective [UK: ˈkʌn.ɪŋ] [US: ˈkʌn.ɪŋ]She is very cunning. = Ella es muy ingeniosa.
ingenious(displaying genius or brilliance; tending to invent) adjective [UK: ɪn.ˈdʒiː.nɪəs] [US: ˌɪn.ˈdʒiː.njəs]They devised ingenious solutions. = Ellos inventaron soluciones ingeniosas.