This is the 5167th most frequent Russian word.
невидимые
Invisible.
Here, "невидимые" is used as an adjective to describe "силы", meaning 'forces'. It emphasizes qualities that are imperceptible or not visible yet influential.
Эти невидимые силы продвигают развитие науки.
These invisible forces drive the progress of science.
"Невидимые" modifies "линии", meaning 'lines', highlighting abstract or metaphorical separations that are not physically visible but carry metaphorical significance.
Невидимые линии между культурами становятся все более очевидными.
Invisible lines between cultures are becoming more evident.
The term "невидимые" describes "друзья", meaning 'friends'. It typically refers to imaginary or figurative companions, common in childhood contexts.