IPA: /ˌsaɪ.kəˈlɒdʒ.ɪ.kəl/
KK: /saɪˈkɒlədʒɪkəl/
Relating to the mind or emotions, often in the context of mental processes or behavior.
The therapist used psychological techniques to help her patients cope with stress.
Psychological → It is formed from "psyche" (from Greek "ψυχή", meaning soul or mind) and "-logical" (from Greek "λογικός", meaning pertaining to reason or thought). The word "psychological" refers to matters relating to the mind or mental processes.
Think of 'psyche' as the mind and 'logical' as relating to reasoning — together, they help you remember that psychological means relating to the mind.