最近、寝不足だ。

I haven't been getting enough sleep lately.

最近(さいきん)、寝不足(ねぶそく)だ。

Saikin, nebusoku da.

最近 (さいきん)

most recent; these days; right now; recently; nowadays

寝不足 (ねぶそく)

lack of sleep

だ (だ)

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

Readings: サイ、シュ、もっと.も、つま

Meanings: utmost, most, extreme

Readings: キン、コン、ちか.い

Meanings: near, early, akin, tantamount

Readings: シン、ね.る、ね.かす、い.ぬ、みたまや、や.める

Meanings: lie down, sleep, rest, bed, remain unsold

Readings: フ、ブ

Meanings: negative, non-, bad, ugly, clumsy

Readings: ソク、あし、た.りる、た.る、た.す

Meanings: leg, foot, be sufficient, counter for pairs of footwear