nadir

D lay back against the sofa and closed his eyes. Dhampir or not, he still
needed sleep. As fighting at night was unavoidable to curb the night prowling Nobility, the daylight hours were naturally the time to rest. The superhuman biorhythms of the Nobility had their nadir at high noon, but
were depressed for a good two hours both before and after that. Veteran
Hunters usually arranged to dispatch their prey during that time frame, and
if all went well they would ordinarily sleep after that until night fell. If they
botched their assignment, the complete advantage they had over their foes
would last only until the sun sank and the afterglow was gone. After that,
they could either fight a battle that was already a foregone conclusion or
hole up somewhere and wait for dawn.

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