Euphonium.
fair
echo sounding, localization
The similar sounding word for "are" is "our."
graze as in cows graze in the pasture
device
In notary terms, an "instrument" is merely another word for a document.
large
Instrument, utensil, gizmo
apparatus, appliance, gadget, tool
A Graphometer, if you're talking about the instrument. Another word for semicircle is hemisphere.
do you mean, like, an instrument? or am I not understanding?;)
the word are is not a long e sounding word