Englishfor English speakers
constancy
Noun
—
Constancy is steadfastness, faithfulness, loyalty
His constancy to our cause is heartening.
of
Preposition
—
Made using.
It is a house of cards.
measuring
—
noun
(= measurement)
the act or process of assigning numbers to phenomena according to a rule
the measurements were carefully done
his mental measurings proved remarkably accurate
instrument
Noun
—
An instrument is any thing people hold in their hand and use to do something.
A hammer is a heavy instrument.
—
An instrument is something used to play music.
I enjoy playing music, my favorite instrument is the guitar.