Transportable comes from transport (from Latin transportare, 'to carry across', from trans- 'across' + portare 'to carry') + the suffix -able. The historical chain includes Latin transportare, Latin trans, and Latin portare. The quoted older senses, "to carry across", "across", and "to carry", supply the semantic anchors for transportable. The formation is best read as suffixal, compound, and borrowed: the word transportable carries its older form-history into a compact English lexical shape. In present English it is used as a adj, "able to be carried or moved from place to place". English derivatives include transportability; related English forms include transport, transportation, portable, import, and export. The result is a adj whose etymology preserves both the older form and the later English specialization.