势必
shìbì · HSK 7
certainly will
🎳 势 (momentum/tendency) + 必 (must) = the trend must happen, so it is bound to occur
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'.