The root 'PORT' in TRANSPORT, PORTABLE, and EXPORT means:

The Latin root PORT means to carry. TRANSPORT is to carry across; PORTABLE means able to be carried; EXPORT is to carry out (goods to other countries); IMPORT is to carry in. Recognizing roots helps you figure out words you haven't memorized. When PORT appears in a word, the idea of carrying or moving is usually involved. Other high-value roots include SPECT (to look, as in inspect), SCRIB/SCRIPT (to write), and DICT (to say). Building a mental list of roots is one of the most efficient ways to expand vocabulary for the test.