ˈɛndlɪs ɪˈtɝnəl ɪˈtɜːnəl ɪnˈtɜː(ɹ).mɪn.ə.bəl ˌsɛm.pɪˈtɜː.nəl ˌsɛm.pɪˈtɝ.nəl having the ends united so as to form a continuous whole an endless chain having no known beginning and presumably no end the dateless rise and fall of the tides time is endless sempiternal truth infinitely great in number endless waves tiresomely long; seemingly without end endless debates an endless conversation the wait seemed eternal eternal quarreling an interminable sermon