lè sí pron /lè sí/
Definitions
  1. who, whom, whose interrogative
    Lè sí i wà Who is that?
    Lè sí yẹn wà Who is that?
Etymology
From lè + sí. Compare with forms in other Yoruba dialects, Oǹdó è sí, Èkìtì ì sí, Ìjèṣà yè sí, Ìyàgbà nè ghí. The use of "sí" can be seen in many interrogative forms in the respective dialects. Cognate with Itsekiri nè sín, Olukumi è ghí, Ede Ije lè é.
Component words
Source: Wiktionary, where this word is spelled “le si”. Reference: en-le_si-yo-pron-PHNbHs0w