  CeBi has an intricate magnetic phase diagram whose fully-polarized state has
recently been suggested as a Weyl semimetal, though the role of $f$ states in
promoting strong interactions has remained elusive. Here we focus on the
less-studied, but also time-reversal symmetry-breaking ferrimagnetic phase of
CeBi, where our density functional theory (DFT) calculations predict additional
Weyl nodes near the Fermi level $E_\mathrm{F}$. We use spin-polarized scanning
tunneling microscopy and spectroscopy to image the surface ferrimagnetic order
on the itinerant Bi $p$ states, indicating their orbital hybridization with
localized Ce $f$ states. We observe suppression of this spin-polarized
signature at $E_\mathrm{F}$, coincident with a Fano line shape in the
conductance spectra, suggesting the Bi $p$ states partially Kondo screen the
$f$ magnetic moments, and this $p-f$ hybridization causes strong Fermi-level
band renormalization. The $p$ band flattening is supported by our quasiparticle
interference (QPI) measurements, which also show band splitting in agreement
with DFT, painting a consistent picture of a strongly interacting magnetic Weyl
semimetal.
