也许

yě xǔ

perhaps; maybe

也

yě

also; too; as well; (not ...) either

许

xǔ

to allow

also (也) + permit in words (许) = perhaps

也 softens a statement into 'also possible,' while 许 adds the sense of permitting or allowing — together they open a door to possibility rather than committing to certainty. 午 is phonetic in 许; the speech radical (讠) carries the meaning of words spoken with some latitude.