wing, plane, flank
翼 centers on the idea of a wing: the limb that enables flight. The meanings 'plane' and 'flank' are natural extensions—an airplane wing and the side of a formation or body that resembles a wing.
翼 combines 羽 (feathers, wings) with 異, which likely contributes the sound and may have originally depicted a winged creature or a mask with wings. The character consistently represents wings or wing-like structures.
Feathers 羽 on top of a strange, large shape 異: imagine a bird with unusually large, distinctive wings. That's 翼, a wing.
For ヨク, picture a yoke (ヨク) used to harness a bird's wings. The yoke controls the wings, and 'yoke' sounds just like ヨク.
wing
left wing
right wing
supporting (e.g. a government); backing up; assistance; countenance
tail (of an aircraft); empennage; tail assembly
one wing
main wings (of an aeroplane, airplane)
both wings; both flanks
wings abreast (e.g. birds in flight)
silvery wings
dominant person; preeminent person; strongest contender
alt-right (ideology)
slotted wing
online right-wingers
to play a part; to get involved; to take a share; to share the burden
delta wing
upper wing of a plane
wing flap
low-wing
flying wing