תַּחַת

tachath (takh'-ath) n-m.
1. the bottom (as depressed)
2. only adverbially, below (often with prepositional prefix underneath), in lieu of, etc
[from the same as H8430]
KJV: as, beneath, X flat, in(-stead), (same) place (where...is), room, for...sake, stead of, under, X unto, X when...was mine, whereas, (where-)fore, with. 
Root(s): H8430

• Part of speech: noun
• Gender: masculine
• Occurrences: 511

• תוח — H8430

• Genesis 1:7

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.