Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

rer-

verb. to sow

A verb appearing as 1st sg. ᴹQ. rerin “I sow” with past tense rende in The Etymologies of the 1930s, derived from the root ᴹ√RED “scatter, sow” (Ety/RED). Here the ancient <em>d</em> became <em>r</em> as it usually did after vowels.

Neo-Quenya: In both Outline of Phonetic Development (OP1) from the 1940s and Outline of Phonology (OP2) from the 1950s, Tolkien indicated that when medial <em>d</em> followed an <em>r</em>, it could dissimilate to <em>l</em> rather that following its usual development to <em>r</em> (PE19/32, PE19/70). In OP2 he gave the verb Q. ral- &lt; √RAD as an example (PE19/99). Thus it is possible that ᴹQ. rer- should be revised to ᴺQ. rel- “to sow” to fit this rule, as suggested by Elaran. However, since Tolkien had this rule in the 1930s but still had ᴹQ. rer- in The Etymologies, I prefer to think the dissimilation of medial d to l was a sporadic change, and would therefore retain rer- for purposes of Neo-Quenya.

Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. orya- “sow” in the Qenya Lexicon under the early root ᴱ√ORO (QL/70).