register; record book
Suffix used in compound nouns to indicate a book or register for official records, accounts, or lists. Common in words like 名簿 (name register) and 家計簿 (household account book).
I added my name to the membership register.
Keeping a household account book helps with saving money.
bookkeeping
account book; ledger; register
public record; official register
ledger; original record; register
The kanji 簿 is used to represent the concept of a register or record book. The reading ぼ is the on'yomi.