Breakdown of Die Frau sieht zu ihm herüber.
die Frau
the woman
sehen
to see /look
zu
to; at
herüber
towards here
her means towards here
über means over
The combination of both words describes a movement towards the speaker.
The opposite of her is hin meaning towards there
hinüber describes a movement away from the speaker.
A way to remember this is the movement of the swing. It goes forth (away) and back, forth and back = hin und her, hin und her...
ihm
Dative form of er
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