Tigre

nəssal - tongue (WTS 325)

The word goes back to *lišān- with metathesis (Kogan 2015: 35, note 69).

PS
*liš(š)ān- - tongue (SED I No. 181)

Judging from Afras. data the original form should be *lis-­, with suffixed *­-ān.