endless

tiresomely long; seemingly without end; "endless debates"; "an endless conversation"; "the wait seemed eternal"; "eternal quarreling"; "an interminable sermon"

infinitely great in number; "endless waves"

having no known beginning and presumably no end; "the dateless rise and fall of the tides"; "time is endless"; "sempiternal truth"

having the ends united so as to form a continuous whole; "an endless chain"