Treacle
In the medieval period, "treacle" referred to medicine
dobber
In British slang, a dobber is a large marble
amblyopic
Possessing a lazy eye
twitting
British slang meaning "insulting [someone]"
chide
Rebuke, scold
fractious
Grumpy, peevish
deride
Mock, ridicule
nominy
A British regional word meaning a speech or a sermon, especially one that is long or tedious
daft
Silly or foolish
tarradiddle
British slang for a petty lie or falsehood
macaronic
A jumble or medley
copse
A thicket of small trees
alder
A type of tree commonly found by riverbanks
shufti
Slang; a look or glance
slutch
British regional slang meaning slush or mud
glim
In Scottish, a passing look or glance; otherwise, a shining light. In Treacle Walker, glim refers to Joe's "good" (not lazy) eye which he uses to see an alternate reality.
mirligoes
Scottish; dizziness or vertigo
dandy
Popularized in the 19th century, meaning a man who is stylish or takes particular care to dress well
tattery
A play on the word "tattered," meaning full of holes and worn-down
oblivion
Obscurity, nothingness