act — BIP39 word #20
"act" is word #20 of the 2048 words in the official BIP39 English wordlist, between across and action.
In a seed phrase it stands for the 11-bit value
00000010011,
decimal index 19.
/ækt/ · verb: to do something or behave in a particular way
Russian: акт
Binary Representation
Three 1-bits and eight 0-bits; 165 of the 2048 indexes have exactly three 1-bits.
One wrong bit turns it into (leftmost bit first):
Position
#20 of 2048
Hex Index
0x013
4-Letter Prefix
act
About "act" in BIP39
Word #20 in the Other 9 BIP39 Wordlists
Similar Words — Check Carefully During Recovery
2 BIP39 words differ from "act" by just a single letter — the most common source of typos when a seed phrase is entered by hand:
Swap two neighbouring letters and "act" becomes cat, another valid word that is easy to miss when copying a phrase.
Read aloud, "act" /ækt/ is one sound away from this word: