Answer:
שָׁפַט <shaphat>
Step-by-step explanation:
1). This is the Hebrew primitive root for to judge, to punish, to vindicate. Depending on the Verbal Mode.
2) The most known Tribulation in the Bible was originally written in Koine Greek in the book of Revelation. This is also referred in Matthew 24, Daniel 9 (this one originally written in hebrew).
3) Since the Great Tribulation was a period of affliction, tests, in which God is the word שָׁפַט < shaphat> would be the more adequate.