According to Kabbalah, how do physical objects derive their life-force from their Hebrew name, if Hebrew doesn't have names for everything?
R' Shneur Zalman of Liadi writes in Shaar Hayichud VeHaemuna
It is written: "Forever, O G‑d, Your word stands firm in the heavens." The Baal Shem Tov, of blessed memory, has explained that “Your word” which you uttered, viz., “Let there be a firmament in the midst of the waters" these very words and letters through which the heavens were created stand firmly forever within the firmament of heaven and are forever clothed within all the heavens to give them life ... And so it is with all created things, in all the upper and lower worlds, and even this physical earth and the realm of the completely inanimate. ...
Now, although the name אבן (“stone”) is not mentioned in the Ten Utterances recorded in the Torah, — how, then, can we say that letters of the Ten Utterances are enclothed within a stone? nevertheless, life-force flows to the stone from the Ten Utterances by means of combinations and substitutions of their letters, whereby an alef, for example, may take the place of a hei, since both letters are articulated by the same organ of speech, and so on, which are transposed in the “two hundred and thirty-one gates,” either in direct or reverse order, as is explained in Sefer Yetzirah,
The names [of all creatures] in the Holy Tongue are the very letters of speech which descend, degree by degree, from the Ten Utterances recorded in the Torah, by means of substitutions and transpositions of letters through the “two hundred and thirty-one gates,” until they reach a particular created thing and become invested in it, thereby giving it life.
As the Maharal explains (as a side point) in his introduction to Tiferes Yisrael, a house is not a house, and a chair is not a chair, for example. A house is made out of wood, just shapes together like a house.
To use this as an answer, there may be no Hebrew word for "television," but there is a Hebrew word for the components which make up a television.