Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
loose end n
to be at a loose end or (US) at loose ends шата́ться (impf) без де́ла
to tie up (the) loose ends заверша́ть (заверши́ть perf) все ме́лочи
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: