indispensably

Adverb

In an indispensable manner; such that one cannot do without it.

Japanese Meaning

必要不可欠なほど / なくてはならないほど

Her technical expertise proved indispensably helpful when the servers went down.

サーバーがダウンしたとき、彼女の技術的な専門知識は不可欠に役立った。

Sense（1）

In an indispensable manner; such that one cannot do without it.

more indispensably

（ comparative ）

most indispensably

（ superlative ）