adjective
/ˌsaɪkəˈlɑːʤɪkəl/ also US psychologic /ˌsaɪkəˈlɑːʤɪk/
of or relating to the mind :mental
of or relating to the study of the mind :of or relating to psychology
psychological warfare
things that are done to make someone (such as an enemy or opponent) become less confident or to feel hopeless, afraid, etc.