Quenya 

ataquanta-

refall, fall second time, double fall

ataquanta- vb. "refall, fall second time, double fall" (sic in PE17:166). The correct gloss must be "refill, fill second time, double fill", which would connect with the verb quanta- "fill" and also make rather better sense.

ataquanta-

verb. *to refill, fill a second time, double fill

@@@ revised glosses suggested by Helge Fauskanger (QQ/ataquanta)

Elements

WordGloss
at(a)-“double, second time, double, [repeat a] second time; [ᴱQ.] bi-, twi-; [ᴹQ.] back, again, re-”
quanta-“to fill, to fill [something], (lit.) make full; [ᴱQ.] to complete, fulfill”