battledore or battledoor /batˈl-dör/ (obsolete or archaic)

1. A light bat for striking a shuttlecock
2. The game played with this
3. A wooden bat used for washing, etc
4. A hornbook

not to know a B from a battledore

To be thoroughly ignorant

• see eye to eye
• see fit
• see how the land lies
• see in
• seeing
• seeings
• seeing stone
• seeing stones
• seeing that
• seek
• seek after
• seeker
• seekers
• seek for
• seeking
• seek-no-further
• seek out
• seeks
• seel
• seeld
• seeled
• seelier
• seeliest
• see life
• seeling