Breakdown of Ayer me hice daño en el dedo con el cuchillo.
con
with / just by (+ -ing)
en
in / on / by (means of transport) / about (after pensar)
me
to me / myself (reflexive) / me (direct object)
el dedo
the finger
el cuchillo
the knife
ayer
yesterday
hacer daño
to hurt, to harm (someone)
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