退

regression to an earlier stage (e.g. infantile)

regression (of cancer); involution (of an organ); atrophy

light crimson (dye)

encouragement to retire early; retirement stimulus

hoarding; storing away (without using)

(light) pink

retirement benefit system; retirement system; retirement plan

backward-looking philosophy (ideology); conservatism

degenerative; regressive; retrogressive

(retirement) pension

discharged patient

abdication ceremony

Law

deportation

restoring the declining fortunes; recovering from the discouraging situation; reversing the downward trend

conservative (regressive) policy

accrued benefit; retirement benefits; post-employment benefits

abdication ceremony

hoarded goods

anaplastic

farewell exhibition; retrospective (exhibition); exhibition in commemoration of retirement

Computing

regression test

vestigial organ

Mathematics

nullity

Ceremony of the Abdication of his Majesty the Emperor at the Seiden State Hall