
Some constraint words make you search for synonyms. THETA makes you search for an entire world where the word can plausibly live. Today those worlds include dreams, brainwaves, meditation, mathematics, Greek-letter societies, politics, and the movement of time itself. Lari takes perhaps the most natural route, putting THETA back into trigonometry, while Debbie and Diana turn it into brain-state weirdness. The week’s movement theme also appears in unexpected forms: zombie pursuit, crisscrossing waves, the settling of the mind, and even the absence of movement after death. With a word this specialized, getting it into the poem is only half the job; the real trick is finding somewhere it belongs.