healthy, health, strength, persistence
健 centers on robust well-being: being healthy, having physical strength, and the persistence that comes from that vitality.
健 combines 亻 (person) with 建, which likely contributes the sound and the idea of standing firmly, suggesting a person in strong, healthy condition.
A person 亻 standing beside 建 (build) suggests someone built solidly: healthy, strong, and persistent.
For ケン, picture a healthy person named Ken who stays strong and persistent: Ken -> ケン.
health
preservation of health; hygiene; sanitation
healthy; sound; wholesome
health care center; health care centre
in good health; alive and well; going strong
fighting bravely; strenuous efforts
vigorous; healthy; sound
non-disabled; having no physical or mental disability; able-bodied
moderate (view, politics, etc.); temperate; sensible; sober; non-radical
poor health; ill health; unhealthy
admirable; commendable; praiseworthy; laudable; brave; heroic; noble; courageous
stalwart youth
morbid; unhealthful; insalubrious
vigour; vigor; virility; health; sturdiness
robust; fit and healthy; strong; sturdy
health insurance
amnesia; loss of memory
forgetfulness
robust (health); strong (constitution); sturdy
good walker