accidentally, even number, couple, man & wife, same kind
偶 centers on things that come together by chance or in pairs: an accidental meeting, a couple, or two things of the same kind. The 'even number' sense is a natural extension of pairing.
偶 combines 亻 (person) with 禺, which likely contributes the sound and the idea of pairing or meeting. The exact historical development of 禺 is uncertain, but the character has long been associated with pairs and chance encounters.
A person 亻 beside 禺, which looks like a pair of stacked boxes with a hook. Imagine two people accidentally meeting and forming a couple, like two matching boxes clicked together.
For グウ, imagine a couple accidentally bumping into each other and saying 'Goo!' in surprise: goo -> グウ, and the accidental meeting makes them a pair.
even number; even
occasional; infrequent; rare
coincidence; chance; accident; fortuity
occasionally; once in a while; now and then
combination
image; idol; statue
sudden outbreak; accidental; incidental
even number
earthen figure; clay figure
pair; couple
wooden doll; wooden figure
coincidentally; by chance; unexpectedly; accidentally; randomly
puppet; doll
something accidentally accomplished; two working together
idolization; idolisation
idolatry; idol worship
idol worshipper; idol worshiper; idolater
idolatry
idolatrous
iconoclasm; image breaking