syntonic

/sษชnหˆtษ’nษชk/

IPA: /S IH1 N T AA1 N IH0 K/

adjective
  1. 1

    In harmony or synergy with one's personality and milieu.

  2. 2

    (of oscillating systems) Having the same frequency.

Source: https://en.wiktionary.org/wiki/syntonic