Definitions:
Definitions in relation to their use in kangaroo words, taken from Google Dictionary, and edited for formatting.
Kangaroo word: retrogress
Joey word: regress
retrogress (verb): go back to an earlier state, typically a worse one.
regress (verb): return to a former or less developed state.
Accessibility explanation:
The letters R, E, G, R, E, S, and S found within the kangaroo word “retrogress” arrange in the listed order to complete the joey word “regress”. While a word can have multiple definitions, in relation to their use with kangaroo words, these two words share a similar meaning: revert.