Japanese question particle か (ka) + しら (shira), the irrealis form of verb 知る (shiru, “to know”), used as an abbreviation of negative form 知らない (shiranai, “don't know”). Literally means “don't know whether...”
かしら (romaji ka shira)
- かしら (ka shira) is similar to かな (ka na), but is used more by women than by men. This particle always comes at the end.
かしら (romaji kashira)