“Prime of life” in Japanese
Short answer
Prime of life in Japanese is “盛年” (seinen). Full meaning: prime of life.
Other ways to say “Prime of life” in Japanese
壮年
sounen prime of life
盛時
seiji prime of life, era of national prosperity
年盛り
toshizakari prime of life
人生の真っ盛り
jinseinomassakari prime of life, noontide of life
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.