straightaway, honesty, frankness, fix, repair
直 centers on straightness: going directly, being frank or honest, and making something correct again. The repair sense fits the idea of straightening or setting something right.
immediately; at once; right away; directly
honest; frank; candid; straightforward
direct; immediate; personal; firsthand
immediately following
correction; rectification
obedient; meek; docile; unaffected
just before; just prior to
soon; in a moment; before long; shortly
direct
to repair; to mend; to fix; to correct (a mistake, bad habit, etc.); to put right; to restore; to straighten (e.g. a tie); to tidy up (one's hair, make-up, etc.); to revive (one's spirits)
review; reconsideration; revision
redoing; doing over again
intuition; instinct; hunch
diameter
at once; immediately; right away; without delay
straight line
direct hit
straight (ahead); direct; upright; erect
confrontation
to get mended; to be repaired; to be fixed
direct
going straight (to); going direct; going without stopping
rīchi; riichi; declaring that one is one tile away from winning while one's hand is completely concealed
frank; candid; straightforward; openhearted; direct; outspoken
直 is associated with the idea of straightness or directness, but the detailed historical development of its components is uncertain.
The vertical structure of 直 looks upright and aligned, like something checked against a straight edge. Straight things are direct, honest, and can be set right.
For チョク, imagine a crooked line snapping straight with a sharp invented sound: chok! The chok sound cues チョク while the line becomes direct and correct.