彼はまことに利口な少年です。

彼はまことに利口な少年です。

He is indeed a clever boy.

彼(かれ)はまことに利口(りこう)な少年(しょうねん)です。

Kare wa makotoni rikōna shōnen desu.

彼 (かれ)

he; him; his; boyfriend

は (は)

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

誠に (まことに、しんに)

indeed; really; absolutely; truly; actually; very; quite

利口 (りこう)

clever; intelligent; wise; bright; sharp; sensible; smart; shrewd; well-behaved (of kids, animals, etc); obedient; good; good (with words)

少年 (しょうねん)

boy; juvenile; young boy; youth; lad

です (です)

be; is

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: リ、き.く

Meanings: profit, advantage, benefit

Readings: コウ、ク、くち

Meaning: mouth

Readings: ショウ、すく.ない、すこ.し

Meanings: few, little

Readings: ネン、とし

Meanings: year, counter for years