invisible

entirely unable to be seen

entirely unable to be seen

very difficult to see

very difficult to see

so difficult to see that it is almost as if it is not there

so difficult to see that it is almost as if it is not there

for the most part, not seen or noticed, especially in an abstract sense

not seen or noticed in a way that produces a particular result; in effect, invisible

to exist in a state of not being seen

to cause someone or something to not be visible

to change into a state of not being seen

to continue to be in a state of not being seen

to cause someone or something to not be visible, often in a formal or abstract context

used to specify who or what cannot see something, e.g. the human eye, the enemy.