The headword is the present indicative active, third person singular, of the contract verb strobe/w (I twirl, whirl about, distract); cf. sigma 1206, and see generally LSJ s.v. The entry is perhaps generated by Aeschylus, Agamemnon 1216, where Cassandra laments that dreadful prophesy whirls her about, agitating (tara/sswn) her (web address 1); on this see further, next note; if so, however, this ignores the fact that lines 1215-1216 as a whole seem to show the verb used there to be the compound u(postrobe/w with tmesis (so LSJ s.v.).
[1] The first gloss is the same form as the headword, but from the verb tara/ssw (Attic tara/ttw); see generally LSJ s.v. (As noted above, its associated present active participle occurs in the aforementioned line of Aeschylus.) The other glosses are the same form as the lemma, but from the contract verbs kine/w, perifobe/w, and katapone/w, respectively. The headword is identically glossed in the Synagoge (sigma254) and Photius' Lexicon (sigma625 Theodoridis). See also Hesychius sigma2011 s.v. strobei=tai; Etymologicum Magnum 730.45 (Kallierges) s.v. stro/mbos (a body spun round, spinning-top; cf. sigma 1211); and the present active participle, neuter nominative plural strobou=nta, with gloss tarasso/mena (same form, except middle-passive voice) at Cramer, p. 484.9.