merle¹ or merl /mûrl/ (archaic or literary Scot)

The blackbird

• right wings
• rigid
• rigider
• rigidest
• rigidified
• rigidifies
• rigidify
• rigidifying
• rigidise
• rigidised
• rigidises
• rigidising
• rigidities
• rigidity
• rigidize
• rigidized
• rigidizes
• rigidizing
• rigidly
• rigidness
• rigidnesses
• rigids
• Rigil
• self-powered
• self-praise