A (primitive?) feminine suffix used in the formation of mîth “baby girl” from the root ✶Ad. √MIYI (SD/427). Tolkien stated that th was one of the “favoured” feminine consonants (SD/427).
Reference ✧ SD/427 ✧ “feminine suffix”
Element In
Ad. mîth “baby girl, maid-child, little girl” ✧ SD/427 (mīth)