the.com/monotony
Time stretched so flat you could iron it.
means Tedious sameness — a lack of variety so complete it dulls the mind.
from From Greek monos (one) plus tonos (tone) — literally one unchanging note, the sound a mind makes when nothing happens.
Music rootMonotone is the same word, just unsung.
Brain effectSameness speeds up perceived time, dulling memory.
OppositeVariety, the thing proverbs call life's spice.