Encara no tenim significats per a "diffuse cheerfulness".
1Mr. McGreggor went in his Rob Roy canoe over the rivers of Europe, " diffusing cheerfulness and distributing Evangelical tracts."
2The removal of the houses, which, not long since, encumbered the bridges, and intercepted the current of air, has diffused cheerfulness and salubrity.
3They sat till pretty late, diffusing cheerfulness all about them, and then, "Come, Oakum," cried the Captain, "we must hoist sail!"