にわたって
(Niwatatte)
over / spanning / across (a period or extent).
Connection rules
- ＋Noun (time / area / domain) + にわたって / にわたり; noun + にわたる + noun (attributive).
- ＋Formal — for long periods or wide scope.
- ＋Common with time: 3年にわたって ('over 3 years'), 長年にわたり ('for many years').
Examples
1.
10年にわたって研究を続けた。
10 nen niwatatte kenkyuu o tsuzuke ta.
I continued the research over 10 years.
「over / spanning / across (a period or extent)」
2.
長年にわたる努力が実を結んだ。
Naganen niwataru doryoku ga mi o musun da.
Many years of effort bore fruit.
「over / spanning / across (a period or extent)」
Practice
The construction work continued over several months.
工事は___行われた。
Romaji also accepted