שָׁלַשׁ

shalash (shaw-lash') v.
1. but apparently used only as denominative from H7969, to be (causatively, make) triplicate (by restoration, in portions, strands, days or years)
[a primitive root perhaps originally to intensify, i.e. treble]
KJV: do the third time, (divide into, stay) three (days, - fold, parts, years old). 
See also: H7969

• Part of speech: verb
• Occurrences: 10

• Genesis 15:9

From Strong's Hebrew and Chaldee Dictionary (1890), which is public domain. This bundle carries the words that spell biblical names and the roots they are built from; the full lexicon of 8,674 entries ships as a bulk table.