Meaning of Glaceon: Any word with 7 or more letters in it
Meaning of glac: any word with 4, 5, or 6 letters in it
Meaning of eon, gla: any word with 3 letters in it
Meaning of on, la: any word with 2 or less letters in it

How can you tell
By the voice
If a Glaceon said
Eon le on glac
In a happy voice it means Yay he/her is happy