Week 6 idioms & suffix

to live in a fools paradise

to be happy without a real basis

the sum and substance

the heart or substantial part

on pins and needles

to be on edge, jumpy

to have at one fingertips 

to have thorough knowledge, to have ready

to let sleeping dogs lie

to let well enough alone, to avoid stirring up old hostilities

thumbs down

signal of rejection

dia-

between, through

ex-

out of, from

geo

earth

equa, equi

equal

mem

remember

meter, metr

measure

-ible

able, relating to

ic

characteristic