swear
/sweə/
Binary Representation
11-bit index: 11011011100 (decimal 1756)
Position
#1757 of 2048
Hex Index
0x6DC
4-Letter Prefix
swea
About "swear" in BIP39
"swear" is the #1757 word
in the official BIP39 English mnemonic wordlist. It is encoded as the 11-bit binary value
11011011100
(decimal index 1756), placing it at the 86% mark of the full 2048-word list.
The 4-letter prefix "swea" uniquely identifies this word among all 2048 entries. At 5 characters, it falls in the typical length range for BIP39 words, balancing readability with distinctiveness during manual wallet recovery.
Near the end of the wordlist (index 1756), "swear" is part of the "S" letter group with 250 entries total, positioned at #240 in that group. Words in the upper range of the list have binary representations with more leading 1s.
In a 12-word seed phrase, each word encodes 11 bits of entropy. The probability of "swear" appearing in any specific position of a randomly generated phrase is 1 in 2048 (≈ 0.049%). A complete 24-word phrase encodes 256 bits of entropy, providing security equivalent to a key space of approximately 1.16 × 10⁷⁷ — far beyond the reach of brute-force attacks.
Word #1757 in the Other 9 BIP39 Wordlists
Every official BIP39 wordlist has exactly 2048 entries, so index 1756 encodes the same 11-bit value
(11011011100) in every language.
A wallet configured for one of these languages would use this word instead of "swear":
Similar Words — Check Carefully During Recovery
One BIP39 word differs from "swear" by just a single letter — the most common source of typos when a seed phrase is entered by hand:
Words sharing the first three letters "swe":
Reminder: the first 4 letters of every BIP39 word are unique across the whole list, so "swea" always identifies "swear".