dispensable

Từ điển Oxford Advanced Learner 8th

dis·pens·able BrE [dɪˈspensəbl] NAmE [dɪˈspensəbl] adjective not usually before noun
not necessary; that can be got rid of
•They looked on music and art lessons as dispensable.
Opp: ↑essential, Opp: ↑indispensable

Word Origin:
[dispensable] early 16th cent. (in the sense ‘acceptable in special circumstances’): from medieval Latin dispensabilis, from Latin dispensare ‘continue to weigh out or disburse’, from the verb dispendere, based on pendere ‘weigh’.