Not missed (in various senses).

Unheeded, disregarded; unnoticed, overlooked; unattended.

(un-, prefix1 affix 2.)

(un-, prefix1 affix 2.)

Not worked upon or at; not touched or treated by way of improvement, alteration, operation, etc.

(un-, prefix1 affix 2.)

That has been paid no attention; disregarded; overlooked, unnoticed.

(un-, prefix1 affix 2. Cf. Danish utappet.)