unnerving

/AH0 N ER1 V IH0 NG/
verb
  1. 1

    To deprive of nerve, force, or strength; to weaken; to enfeeble.

    โ€œto unnerve the armโ€

  2. 2

    To make somebody nervous, upset, alarm, shake the resolve of.

    โ€œI was greatly unnerved by the news that my attacker was back in the country.โ€

Source: https://en.wiktionary.org/wiki/unnerve, https://en.wiktionary.org/wiki/unnerving