Early Primitive Elvish
lanta
noun. lanta
soto
root. drop, fall
ðoto
root. drop, fall
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 Qenya Lexicon of the 1910s glossed “drop, fall” but with no Qenya derivatives (QL/86). In the Qenya Lexicon Tolkien gave the root as SOTO with ÐOTO in parenthesis, but Gnomish cognates like G. dod- “to fall down, drop” and G. dont “fall, bump, drop” make it clear the true form was ÐOTO.
Neo-Eldarin: I think it is worthwhile to salvage this root as ᴺ√DOT in the more limited sense “drop” for purposes of Neo-Sindarin, so we can salvage Gnomish words such as dod- “to drop” and dod “berry”. This hypothetical ᴺ√DOT could be a variant of √DAT “fall”.