thorough / penetrating / to pervade / to pass through
彻
=
切
+
彳
:
Charlie Chaplin (ch) is thoroughly (彻) investigating his black sneakers (彳) in the elevator's bathroom (e4). He cuts (切) them very thoroughly right to the bone (彻).
悟
=
吾
+
忄
:
Willy Walrus (w) is idly playing with a flail (忄) in the space station's bathroom (Ø4). Suddenly he realizes (悟) that his flail will be much more effective if he attaches a mandarin colored pentagram (吾) to the flail's head.