Yap.Town

有効だ

valid

phrase Uncommon #14,895
valid Also means “effective” when describing a method or action. The だ makes the statement plain and direct.
JA: このクーポンは今日まで有効だ。
EN: This coupon is valid until today.

あのとき私がした約束は有効だ。

The promise I made back then is still valid.

その態度はその状況においては有効だ。

That attitude is effective in that situation.

切符は三日間有効だ。

The ticket is valid for three days.

この切符はまだ一週間有効だ。

This ticket is still valid for another week.

それは細菌感染に有効だ。

It is effective against bacterial infections.