息子たちは若い盛りだ。

息子たちは若い盛りだ。

My sons are in the heyday of youth.

息子(むすこ)たちは若(わか)い盛(も)りだ。

Musukotachi wa wakai mori da.

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

若い (わかい)

young; youthful; immature; green; low (number); small

盛り (もり)

serving (of food); helping; chilled soba served on a dish (often on a wicker basket or in a shallow steaming basket) with dipping sauce

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: ソク、いき

Meanings: breath, respiration, son, interest (on money)

Readings: シ、ス、ツ、こ、 -こ、ね

Meanings: child, sign of the rat, 11PM-1AM, first sign of Chinese zodiac

Readings: ジャク、ニャク、ニャ、わか.い、わか-、も.しくわ、も.し、も.しくは、ごと.し

Meanings: young, if, perhaps, possibly, low number, immature

Readings: セイ、ジョウ、も.る、さか.る、さか.ん

Meanings: boom, prosper, copulate