absent-minded

a.心不在焉的

abracadabra, abrade, abrasion, abrasive, abreast, abridge, abridged, abridgement (also abridgment), abroad, abrogate, abrogation, abrupt, abruptly, abruptness, abscess, abscission, abscond, abseil, absence, absent, absent-mindedly, absent-mindedness, absentee, absentee ballot, absentee landlord, absenteeism, absentminded, absinthe (also absinth), absolute, absolute majority, absolute zero, absolutely, absolution, absolutism, absolutist, absolve, absorb, absorbed, absorbent, absorbing,