unsubstitutably
Such that it cannot be substituted, or used as a replacement or alternativeSuch that it cannot be substituted, or used as a replacement or alternative.
Meaning
1 senses(not comparable)Such that it cannot be substituted, or used as a replacement or alternative.
Origin
From unsubstitutable + -ly.From unsubstitutable + -ly.
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Lessons for this word
1 lessons- A2Adverbs of manner — Because it is an -ly adverb