absentminded

a. 心不在焉的,茫然的,恍惚的

abridgement (also abridgment), abroad, abrogate, abrogation, abrupt, abruptly, abruptness, abscess, abscission, abscond, abseil, absence, absent, absent-minded, absent-mindedly, absent-mindedness, absentee, absentee ballot, absentee landlord, absenteeism, absinthe (also absinth), absolute, absolute majority, absolute zero, absolutely, absolution, absolutism, absolutist, absolve, absorb, absorbed, absorbent, absorbing, absorption, abstain, abstain from, abstainer, abstemious, abstemiously, abstemiousness,