Bip39 List. Increased security: By storing your keys offline, hardware wallets safeguard against online hacks and malware. For words that have only 3 letters, there isn't any 4th letter. For instance with the word “insert”, there aren't any a lot more letters afterwards and thus should be the word "increase". https://seozdirectory.com/listings13050976/bip39-seed-phrase-https-linktr-ee-bip39-bip39-words-an-overview