How can it be compared, this difference of twofold or fivefold?
Tips
history
蓰 means 'five times' and is not used independently today. It survives in the classical phrase 倍蓰 ('twofold and fivefold', i.e. several times over), notably in 《孟子》. The grass radical 艹 is decorative here; 徙 supplies the sound.
register
Archaic and literary, found only in the fixed pairing 倍蓰 in classical prose. Not used in modern speech.
艹 is the grass radical, the top form of 草. In 蓰 it is the indexing radical but adds no real plant meaning; the number sense comes from the whole graph.
