Word #644 01010000011

expire — BIP39 word #644

"expire" is word #644 of the 2048 words in the official BIP39 English wordlist, between expect and explain. In a seed phrase it stands for the 11-bit value 01010000011, decimal index 643.

/ɪkˈspaɪə/ · verb: to come to the end of the period in which it is valid

Russian: истекать

Binary Representation

Four 1-bits and seven 0-bits; 330 of the 2048 indexes have exactly four 1-bits.

One wrong bit turns it into (leftmost bit first):

spare away idea document flash federal fame fabric extend expand expect

Position

#644 of 2048

Hex Index

0x283

4-Letter Prefix

expi

About "expire" in BIP39

"expire" has 6 letters, but the first four, "expi", already identify it, because "exp" also begins expand, expect, explain, expose and express.
"expi" is unique only within the English list: it also begins expirar in the Portuguese list, so a four-letter backup should say which list it uses.