to dot one’s i’s and cross one’s t’s

to dot the i’s and cross the t’s

to dote on someone

to be dotty

to be dotty about someone/something

I am dotty about her.

to be dotty about someone

Double, double toil and trouble // Fire burn, and cauldron bubble.

I am double your age.

to double-park

It’s double Dutch to me.

double faced adhesive tape

a double room

to double-cross

double room

to do a double take

double dealer

in double-quick time

double bind

double cabin

Double curve

double-Dutch

double job holding

to double-check

double or quits