Answer: tedious

AnswerCrossword Clue
TEDIOUSEngendering ennui.
tediouslong and tiresome
tediouscausing weariness
TEDIOUSLike a really boring job
TEDIOUSWearing
TEDIOUSTiresome
TEDIOUSHardly exciting
TEDIOUSHumdrum
TEDIOUSBoring.
TEDIOUSProlix so as to cause weariness.
TEDIOUSYawn-producing.
TEDIOUSBoring
TEDIOUSDull.
TEDIOUSBoresome.
TEDIOUSPromoting ennui.
TEDIOUSCreating boredom.
TEDIOUSSlow-going.
TEDIOUSOh so boring
TEDIOUSRepetitive and boring
TEDIOUSLong and tiresome
TEDIOUSLike envelope-stuffing
TEDIOUSNo fun to listen to