A root in The Etymologies of the 1930s with derivatives ᴹQ. míwa and N. mîw “small, tiny, frail” (EtyAC/MIW²).
Middle Primitive Elvish
miw
root. whine
miw
root. *small, tiny, frail
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A root in The Etymologies of the 1930s glossed “whine”, with derivatives like ᴹQ. maiwe/N. maew “gull” and ᴹQ. miule “whining, mewing” (Ety/MIW). Tolkien’s continued use of Q. maiwë (MC/222) and S. maew (PE17/97) for “gull” indicates the ongoing validity of this root. The word ᴱQ. māwe “gull” appeared under the root ᴱ√MAWA “?cry, bleat” (the “?” is Tolkien’s) in the Qenya Lexicon of the 1910s, along with other derivatives like ᴱQ. maule “crying, weeping” and ᴱQ. moa “sheep” (QL/60), making this early root a likely precursor to ᴹ√MIW.