Definitions in relation to their use in these kangaroo words, taken from Google Dictionary, and edited for formatting.
Kangaroo word: deteriorate
Joey word: die
Joey word: rot
deteriorate (verb): become progressively worse.
The letters D, I, and E found within the twin kangaroo word “deteriorate”, and the letters R, O, and T both arrange in the listed order to complete the joey words “die” and “rot”. While a word can have multiple definitions, in relation to their use with kangaroo words, these three words share a similar meaning: get worse.