In antonym requests, context is often essential. It would be fairer if the same context were kept for 'negligible' and for the requested opposite. For example, "air resistance is negligible while porridge resistance is ??". And for this particular context, the already proposed 'significant' fits (as well as others, such as 'critical'; okay, I'm stretching it a bit).

Introducing the bike perspective flattens the meaning of 'negligible' in that it makes one think along an axis in terms of distance. That is where measures and infinity jump in, with their own contextual problems. A related post about 'infinitesimal' documents the quandary ('finite' vs. 'infinite' vs. 'infinitesimal', also mentioned by Hunter Hogan here).

What is the opposite of 'blue'? This and like questions may be bent to make some sense, a different sense, or a very particular sense, by a context. In view of the RGB model, for example, the opposite of 'blue' is arguably 'yellow'.

In antonym requests, context is often essential. It would be fairer if the same context were kept for 'negligible' and for the requested opposite. For example, "air resistance is negligible while porridge resistance is ??". And for this particular context, the already proposed 'significant' fits (as well as others, such as 'critical'; okay, I'm stretching it a bit).

Introducing the bike perspective flattens the meaning of 'negligible' in that it makes one think along an axis in terms of distance. That is where measures and infinity jump in, with their own contextual problems. A related post about 'infinitesimal' documents the quandary ('finite' vs. 'infinite' vs. 'infinitesimal', also mentioned by Hunter Hogan here).

What is the opposite of 'blue'? This and like questions may be bent to make some sense, a different sense, or a very particular sense, by a context. In view of the RGB model, for example, the opposite of 'blue' is arguably 'yellow'.