PES

*mḥr - to have compassion; to have pity (SED I 204)

Related with metathesis.

PS
*rḥm - to be compassionate (Kogan 2015: 386)

Geez
mḥr - to have compassion (CDG 336)
Tigre
mäḥarä - to have pity (WTS 111)
Tigrinya
mäḥarä - avere pietà (to have mercy) (TED 347, Bassano 1918: 78)
Amharic
marä - to pardon, forgive, to have mercy (AED 171)
Argobba
mɛḥar - verzeihen (to forgive) (Wetter 2010: 90, AAD 98)
Selti
mārä - to forgive, pardon (EDG 417)
Wolane
marä - to forgive, pardon (EDG 417)
Zway
mārä - to forgive, pardon (EDG 417)
Chaha
marä - to forgive, pardon (EDG 417)
Ezha
marä - to forgive, pardon (EDG 417)
Endegen
mārä - to forgive, pardon (EDG 417)
Ennemor
mārä - to forgive, pardon (EDG 417)
Gyeto
mārä - to forgive, pardon (EDG 417)
Muher
marä - to forgive, pardon (EDG 417)
Masqan
marä - to forgive, pardon (EDG 417)
Gogot
marä - to forgive, pardon (EDG 417)
Soddo
marä - to forgive, pardon (EDG 417)