ikisinin

Ikisinin is a Turkish genitive form derived from the numeral iki (two). It marks possession or association by two referents, functioning as the equivalent of English “of both” or “the two’s.” In usage, ikisinin precedes a noun in the genitive case to indicate joint ownership or affiliation, and the ending is chosen to fit Turkish vowel harmony, with ikisinin being the common realization.

In practice, ikisinin is used when discussing something belonging to two people or things. For example, Ikisinin de onayı gerekir translates to “Both of them must give their approval.” Another example is Bu plan ikisinin de kararıyla değiştirildi, meaning “This plan was changed by the decision of the two.” The construction is standard in formal or written Turkish, including legal or administrative contexts where joint ownership, consent, or shared attributes are described.

Notes on usage: ikisinin is the general and widely accepted form for indicating joint possession by two entities. In more casual speech, speakers may instead opt for phrases like iki kişinin onayı (the approval of two people) to express a similar idea. Ikisinin de remains a concise, formal option for referring to what belongs to both members of a pair.