The [h] sound developed initially in Ilkorin from the aspirate [kʰ] (PE19/18), which first became the voiceless velar spirant [x] and then further changed into [h]. There was a similar development medially, but here the resulting [h] vanished (PE19/23). As such, [h] usually only appear initially in Ilkorin, but on rare occasions could appear medially, such as when it developed from primitive medial [kʰw] (PE19/23).