Juncture

google

ref

late Middle English (in the sense ‘act of joining’): from Latin junctura, ‘joint’, from jungere ‘to join’.

wiktionary

ref

From Latin iūnctūra. Doublet of jointure.

etymonline

ref

juncture (n.)

late 14c., "place where two things are joined," from Latin iunctura "a joining, uniting, a joint," from iunctus, past participle of iungere "to join together," from nasalized form of PIE root *yeug- "to join." Meaning "action of joining together" is from 1580s. Sense of "point in time" first recorded 1650s, probably from astrology.