何必
hébì · HSK 7
why must...?
何 (what/why) + 必 (must) = why must...? there's no need
何 carries the question sense what/why; 必 means must or necessarily. Stacked together they push back on a plan: why must it be so — i.e. there is no need.
必 — heart 心 + slash 丿
Originally depicted a handle or marker driven through something, suggesting a fixed standard. The form was later reanalyzed as 心 (heart) with a stroke through it, reinforcing the sense of inner certainty. It came to mean 'must' or 'certainly'.