wearisome

so lacking in interest as to cause mental weariness; "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldnt capture their attentio

संगोष्ठी मे कोई नीरस अंतराल नही था

The seminar was wearisome with no intervals.