Place = Through, across.
Examples.—Li iris tra la amaso, kaj eniris en la domon = He went through the crowd and entered the house. Tra la mondo iras forta voko = Through the world goes a powerful call. Li estas tiel dika, ke li ne povas trairi tra nia mallarĝa pordo = He is so stout (thick) that he cannot go through our narrow door.
Adverb: trae = right through.
Occasionally the accusative of direction is used after tra, when this seems useful for emphasis, or to remove ambiguity.
As a prefix, Tralegi = To read through. Trapasi = To pass through, to traverse. Traguti = To percolate.
259 (34). Trans = Across; on the other side of, beyond.
May be followed by the accusative of direction.
Place = Across, beyond, on the other side of.
Examples.—La hirundo flugis trans la riveron, ĉar trans la rivero sin trovis aliaj hirundoj = The swallow flew across the river, because on the other side of (beyond) the river were (found themselves) other swallows.
As a prefix, Transiri = To go over, to cross. Transmigri = To migrate. Transvivi = To outlive, survive (a period of time).