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vibrancy; strength; bravery; manliness
one's prime (around age 30; esp. of a man)
counter for cones or sticks of moxa burned on the skin (in moxibustion)
明日は雨が降りそうだ。
It looks like it's going to rain tomorrow.
彼は壮年期に大きな功績を残した。
He achieved great things in his prime.
この本は面白そうに見える。
This book looks interesting.