Word #40 00000100111

agent — BIP39 word #40

"agent" is word #40 of the 2048 words in the official BIP39 English wordlist, between age and agree. In a seed phrase it stands for the 11-bit value 00000100111, decimal index 39.

/ˈeɪʤənt/ · noun: a person who acts on behalf of another person or group

Russian: агент

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):

lumber eager ceiling belt artefact abstract alone album afford again age

Position

#40 of 2048

Hex Index

0x027

4-Letter Prefix

agen

About "agent" in BIP39

"agent" has 5 letters, but the first four, "agen", already identify it, because "age" also begins age.
Its first letters also spell another BIP39 word, age. Write "agent" out in full: cut short, it turns into a different valid word.
"agen" is unique only within the English list: it also begins agencer in the French list, agente in the Italian list and agenciar in the Portuguese list, so a four-letter backup should say which list it uses.
"agent" appears in one of the 24 official English test vectors of BIP39: vector #5 (word 18 of 18). Every official vector passes the checksum checker, and How BIP39 works shows how the entropy turns into such words. As the last word of vector #5, its final 6 bits, 100111, are the checksum of the 18-word phrase.