Teoriyi

Teoriyi is the definite accusative form of the Turkish noun teori, meaning theory. In Turkish, theories and other abstract concepts are treated as countable nouns that can take the accusative case when they function as direct objects. The suffix -yi (with vowel harmonious variants -yi, -yı, -yu, -yü) marks definiteness and the direct object. In practice, teoriyi appears in sentences such as Bu teoriyi okudum (I read this theory) or Teoriyi savundular (They defended the theory).

Etymology and usage. The Turkish word teori is a loanword derived from Western languages, most likely French theorie, which in turn traces back to the Greek theoria. The form teoriyi reflects Turkish nominal morphology, including vowel harmony and the definite direct object suffix. The word is widely used across disciplines such as philosophy, science, and social sciences to denote a tested or proposed explanation or framework.

Related forms. The plural of teori is teoriler, and its definite direct object plural form is teorileri. Related terms include teori, teorik (theoretical), and teoriye (to the theory) in different case forms. In academic writing, teoriler or teorileri may be used depending on number and definiteness.

See also. Theory in other languages; theoretical and theoretical frameworks; hypotheses; epistemology.

Notes. Turkish nouns do not require articles; definiteness is shown through suffixes like -yi for the accusative direct object. The form teoriyi is specifically used when referring to “the theory” as the direct object of a verb or a preposition that governs the accusative.