source: By Unknown author - (1999) "Kimotsuki River and Friends" Ministry of Land, Infrastructure and Transport and Tourism, p.36., Public Domain

verb with object

1. overwhelm (someone) with things or people to be dealt with:

〖通例be ～d〗 «…が» 押し寄せる, 殺到する «with»

e.g. we've been inundated with complaints from listeners.

2. flood:

〈場所〉を冠水させる, 水浸しにする, …に氾濫する

e.g. the islands may be the first to be inundated as sea levels rise.

late 16th century: (earlier (late Middle English) as inundation) from Latin inundat- ‘flooded’, from the verb inundare, from in- ‘into, upon’ + undare ‘to flow’ (from unda ‘a wave’).