電話番号を忘れる

denwa bangō o wasureru

verb phrase★Intermediate— to forget a phone number

informal

To forget or lose a phone number, typically due to memory lapse or not saving it properly.

新しい番号に変わったので、古い電話番号を忘れてしまった。

I changed my number, so I forgot the old phone number.

メモに書いておくべきだった…電話番号を忘れてしまった。

I should have written it down... I forgot the phone number.

💡

Common in everyday conversations when someone can't recall a phone number.

Collocations

to forget a number (general)

to lose contact information

To avoid forgetting phone numbers, save them in your contacts immediately.

Don't confuse this with 電話番号を聞く (to ask for a phone number).

Combination of 電話番号 (phone number) + 忘れる (to forget).

Often used when someone realizes they didn't save a number or can't recall it. Can also imply frustration or inconvenience.

電話番号

phone number

noun

を

object marker

particle

忘れる

to forget

verb

和英辞典