lack / gap / fail

Alternative form of 欠ける

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

a plan, planning, schedule, conception

to plan, to make a plan, to plot, to lay out

What? What did you say?

whatchamacallit, X

what

What?, Huh?

what / that thing (used in place of words you can't remember at the moment.)