- penetration, insight - clear or deep perception of a situation
--1 is a kind of perception
- insight, perceptiveness, perceptivity - a feeling of understanding
--2 is a kind of sensibility
- insight, brainstorm, brainwave - the clear (and often sudden) understanding of a complex situation
--3 is a kind of understanding, apprehension, discernment, savvy
--3 has particulars:light; revelation; discovery, breakthrough, find; flash - insight, sixth sense - grasping the inner nature of things intuitively
--4 is a kind of intuition