ここだけの話だが、彼はいささか間が抜けている。

Sentence Analyzer

ここ だけ いささか 抜けている

English Translation

Between you and me, he is rather stupid.

Furigana

ここだけの(はなし)だが、(かれ)はいささか()()けている。

Romanji

Koko dake no hanashi da ga, kare wa isasaka ma ga nuketeiru.

Words

此処 (ここ)
here (place physically close to the speaker, place pointed by the speaker while explaining); this place; these last (followed by a duration noun and a past sentence: time period before the present time of the speaker); these next ... (followed by a duration noun and a non past sentence: time period after the present time of the speaker); the next ...
(だけ)
only; just; merely; simply; no more than; nothing but; alone; as (e.g. as soon as, as much as); worth
()
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
(はなし)
talk; speech; chat; story; conversation; discussions; negotiation; argument
()
be; is; indicates past or completed action; indicates light imperative
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
(かれ)
he; him; his; boyfriend
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
聊か (いささか)
a little; a bit; somewhat
()
space; room; time; pause
抜ける (ぬける)
to come out; to fall out; to be omitted; to be missing; to escape; to come loose; to fade; to discolour; to wear a hole (e.g. clothes); to leave (e.g. a meeting); to be clear; to be transparent (e.g. of the sky); to be stupid; to be absentminded; to be careless; to be inattentive; to exit (a program loop)

Kanji

Readings: ワ、 はな.す、 はなし
Meanings: tale, talk
Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: カン、 ケン、 あいだ、 ま、 あい
Meanings: interval, space
Readings: バツ、 ハツ、 ハイ、 ぬ.く、 -ぬ.く、 ぬ.き、 ぬ.ける、 ぬ.かす、 ぬ.かる
Meanings: slip out, extract, pull out, pilfer, quote, remove, omit