singly
adverb
one
at a
time
;
separately
or
individually
1. 1つ1つ, 1つずつ; 一人一人, 1人ずつ(one by one); 別々に, 個々に; 単品で
Misfortunes never come singly.
〘ことわざ〙 不幸は重なるもの;「泣きっ面にハチ」
2. 単独で, 独力で, ほかの助けを借りずに.