⌃W and ⌃U are not precisely ^W and ^U, because "^" is pure Ascii and more classic, but ⌃ is the Unicode Up Arrowhead U+2303 that's part of ⌃ ⌥ ⇧ ⌘ ← ↑ → ↓ ⎋ ⏎ ⇥ ⇤