letter — BIP39 word #1029
"letter" is word #1029 of the 2048 words in the official BIP39 English wordlist, between lesson and level.
In a seed phrase it stands for the 11-bit value
10000000100,
decimal index 1028.
/ˈlɛtə/ · noun: a written message sent by mail, or a symbol in an alphabet
Russian: письмо
Binary Representation
Two 1-bits and nine 0-bits; 55 of the 2048 indexes have exactly two 1-bits.
One wrong bit turns it into (leftmost bit first):
Position
#1029 of 2048
Hex Index
0x404
4-Letter Prefix
lett
About "letter" in BIP39
- "letter" has 6 letters, but the first three, "let", already identify it, because "le" also begins 17 other words, among them leader, leaf, learn and leave. Three letters are enough for only 604 of the 2048 words.
- "lett" is unique only within the English list: it also begins lettre in the French list and letterale in the Italian list, so a four-letter backup should say which list it uses.
- "letter" appears in three of the 24 official English test vectors of BIP39: vectors #3 (words 1 and 9 of 12), #7 (words 1, 9 and 17 of 18) and #11 (words 1, 9 and 17 of 24). Every official vector passes the checksum checker, and How BIP39 works shows how the entropy turns into such words.
letter advice cage absurd amount doctor acoustic avoid letter advice cage above
Word #1029 in the Other 9 BIP39 Wordlists
Similar Words — Check Carefully During Recovery
One BIP39 word differs from "letter" by just a single letter — the most common source of typos when a seed phrase is entered by hand:
Read aloud, "letter" /ˈlɛtə/ is one sound away from these 2 words: