Probably for 'oren; a pole (as a mast or flag-staff) -- beacon, mast.
see HEBREW 'oren
H8650. toren
תֹּ֫רֶן noun masculine mast (Late Hebrew id.; √ unknown; HoffmPhoenician Inscr. 27 f. conjecture תארן, from ארן, see אֹרֶן); — absolute ׳ת, of Tyre as ship Ezekiel 27:5; ׳ת הָהָר עַלרֿאֹשׁ Isaiah 30:17 ("" נֵם), i.e. a (solitary) standard-pole, flag-staff; suffix תָּרְנָם 33:23 ("" חֲבָלִים נֵם.
תַּרְעֵלָה see [רעל].