5158  nachal  nakh'-al

 or (feminine) nachlah (Psalm 
124:4) {nakh'-law}; or 
nachalah (Ezekiel 47:19; 
48:28) {nakh-al-aw'}; from 
5157 in its original sense; a 
stream, especially a winter 
torrent; (by implication) a 
(narrow) valley (in which a 
brook runs); also a shaft (of 
a mine):--brook, flood, 
river, stream, valley.

 see HEBREW for 05157