Psyykkisiin

Psyykkisiin is the illative plural form of the Finnish adjective psyykkinen, meaning psychic or psychological. It is used when describing plural nouns in the illative case, indicating movement toward or into the referenced psychic things or matters.

Etymology and grammar: The root psyykk- derives from the broader concept of psychology and psychic phenomena. In Finnish, adjectives agree with the nouns they modify in number and case, so psyykkinen takes the inflected endings of the illative plural for a plural noun, producing psyykkisiin when the noun is in illative plural form. This construction is common in formal or descriptive Finnish texts dealing with multiple psychic phenomena, abilities, or related subjects.

Usage and examples: Psyykkisiin typically accompanies plural nouns such as ilmiöt (phenomena) or kyvyt (abilities). For example, "psyykkisiin ilmiöihin liittyy kiistanalaisia selityksiä" translates to “there are controversial explanations relating to psychic phenomena,” while "psyykkisiin kykyihin kohdistuva tutkimus" means “research aimed at psychic abilities.” The form is primarily found in scientific, literary, or discourse contexts rather than everyday casual speech.

Related forms and notes: The base adjective psyykkinen also forms a singular nominative "psyykkinen ilmiö" (a psychic phenomenon) and other cases follow standard Finnish adjective declension. The term does not denote a single organization or movement; rather, it is a grammatical form used within sentences to refer to multiple psychic topics in the illative plural.

In summary, psyykkisiin is a grammatical resource for expressing movement toward or into multiple psychic things or matters, occurring as the illative plural of psyykkinen.