Word #1899 11101101010
unhappy — BIP39 word #1899
"unhappy" is word #1899 of the 2048 words in the official BIP39 English wordlist, between unfold and uniform.
In a seed phrase it stands for the 11-bit value
11101101010,
decimal index 1898.
/ʌnˈhæpi/ · adjective: sad, or not satisfied with something
Russian: несчастный
Binary Representation
Seven 1-bits and four 0-bits; 330 of the 2048 indexes have exactly seven 1-bits.
One wrong bit turns it into (leftmost bit first):
Position
#1899 of 2048
Hex Index
0x76A
4-Letter Prefix
unha
About "unhappy" in BIP39
- "unhappy" has 7 letters, but the first three, "unh", already identify it, because "un" also begins 17 other words, among them unable, unaware, uncle and uncover. Three letters are enough for only 604 of the 2048 words.
- "unha" is unique only within the English list: it also begins unha in the Portuguese list, so a four-letter backup should say which list it uses.