2.加入,參與釋義下的同義詞 uniting joining adding on appending tacking attaching combining annexing

3.增長,擴展釋義下的同義詞 extension enlargement expansion accession continuation prolongation accretion addendum increment augmentation increase

4.總共,計算釋義下的同義詞 counting enumerating adding computation calculation totalling up summation tallying reckoning

5.附加,輔助,補充釋義下的同義詞 tailpiece codicil interpolation appendage add annexation addendum suffix on additament superaddition supplement insertion attach