שְׂמָמִית Semamit
Every verse in which this word stands — 1 place, in canonical order, first appearance to last. These are the places the lexicon carries under this word's own entry, counting every form the text writes it in, which is the number on the list.
Once, in Mishlei 30:28 — the semamit you can catch in your hands, yet she is in kings' palaces. Spider or gecko; the identification is discussed.
שְׂמָמִית בְּיָדַיִם תְּתַפֵּשׂ וְהִיא בְּהֵיכְלֵי מֶֽלֶךְ
The spider thou canst take with the hands, Yet is she in kings’palaces.
Quick answers
What is the Hebrew word for semamit?
Semamit in Hebrew is שממית, with a gematria of 790 in the standard method.
How many times is the semamit mentioned in the Tanakh?
The word stands 1 time in the Tanakh, first at Proverbs 30:28.
A spelling is not a word. The bare letters שממית stand 1 time in the corpus, which is a different question and often a different number: the same letters can spell a name or another word entirely, and the creature written with a particle attached is a spelling that search never returns. It is here, as itself.
See the one occurrence of the spelling שממית →