Bip39 Words. These words are then applied to produce a seed, which can be useful for generating extended keys in the hierarchical deterministic wallet. Having said that, provided that you again up your BIP39 seed there won't be risk to missing your fund. To access them with custom made PBKDF2 https://financenews60369.gigswiki.com/5277966/the_anatomy_of_the_bip39_phrase_entropy_text_and_protection