noun

the state of feeling bored.

I’ll die of boredom if I live that long

weariness,ennui,lack of enthusiasm,lack of interest,lack of concern,apathy,uninterestedness,unconcern,languor,sluggishness,accidie,malaise,world-weariness,frustration,dissatisfaction,restlessness,restiveness,tedium,tediousness,dullness,monotony,repetitiveness,lack of variety,lack of variation,flatness,blandness,sameness,uniformity,routine,humdrum,dreariness,lack of excitement,deadliness,sameyness