This tablet's portability makes it easy for business people to carry between meetings.

portability 是由形容词 portable（便携的）加上名词后缀 -ity 构成的名词。portable 来自动词 port（携带、搬运）和形容词后缀 -able（能够...的），字面意思是"能够携带的"。portability 表示"便携性"，指物品便于携带的特性。