程度・範囲・強調N1
〜だに
even... / so much as... (in negatives: not even...)
Structure
V-辞書形 + だに；N + に + だに
Explanation
A literary, emphatic form of さえ (even); usually with a negative: not even...
Examples
そんなことは想像だにしなかった。
I never so much as imagined such a thing.
まさか彼がそこにいるとは、思いだにしなかった。
I never even imagined he would be there.
Note
Literary, often in fixed phrases like 想像だにしない/思いだにしない, usually with a negative.