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saI ka l ji
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part of speech: noun
inflections: psychologies
definition: the study or science of the mind and of the ways that people feel and act.
Studying psychology has made him a more effective salesperson because he understands what motivates people to buy things.
Word Builder: psychology +
  • psychologist:
    a person who has studied the way people think and act and who treats mental problems.
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  behavior, emotion, mind, science, thought
Word Parts  About this feature
The word psychology contains the following parts:
psych, psycho Greek root that means mind, soul, mental process
-logy, -ology Greek noun-forming suffix that means study of, science of; written work; structure or principle
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The suffix -logy , -ology forms nouns from bases that are predominantly Greek roots. It is a terminal form of the root log, logo, -logue which in the vast majority cases signifies the study or science of the subject indicated by the base. In some words, however, -ology carries the meaning "written work" (trilogy) or "structure" (homology). See log, logo, -logue. Most nouns ending in -logy , -ology have an adjective form ending in "-ical." (dermatology, dermatological).