reject, retreat, recede, withdraw, repel, repulse
斥 centers on forceful pushing away: rejecting something, repelling an attack, or withdrawing from a position. The retreat sense is a natural extension of moving back under pressure.
斥 is thought to combine 斤 (axe) with a dot, possibly representing something being cut or split away, giving the idea of rejection or pushing back. The exact historical development is uncertain.
Picture an axe 斤 with a small dot 丶 flying off it, like a chip being rejected. The axe pushes the chip away, just as 斥 means to repel or reject.
For セキ, imagine a security guard rejecting entry at a gate: "Security!" -> セキ, and the guard repels anyone without a pass.
rejection; expulsion; boycott; ostracism
scout; patrol; spy
repulsion; repulsive force
xenophobia; exclusion (of foreigners)
dark energy
expulsion movement; boycott
rejection; ostracism
reconnoitering party; scout (army)
reconnoitering party; scout (army)
exclusion
(time limit imposed by the) statute of limitations