This verse is deliberately cryptic and heavily driven by sound. On the surface it looks like a string of near-nonsense words and percussion syllables, but Siddhar writing often uses such “noise” as concealment and as instruction.

1) Alchemical/medical layer: “uppu” (salt) is an ordinary substance, while “muppu” in Siddha tradition can denote the rare catalytic “universal salt” used to mature medicines and metals. “muppuk kēṭu” (spoilage of muppu) warns that the crucial agent can be ruined by wrong handling—impure ingredients, wrong heating, wrong sealing, or wrong timing. “kūṭu / pūṭu / mūṭu” (container/cover/close) repeatedly points to the vessel, sealing, and containment—key themes in kupi-pāka and related processes.

2) Yogic-inner layer: “kāṭu” (forest) is a common metaphor for the untamed body–mind in which one gets lost (stupor, “mappu”). “appu” can be read as the water-principle (āpas), bodily fluids, or the cooling/moist aspect of practice; “sealing the water” can imply conserving vital fluids/energy or stabilizing the mind that “flows.” The instruction “seek the fault” reads like a yogic injunction to detect the subtle error in practice—posture, breath ratio, attention, diet, or restraint.

3) Rhythmic-code layer: “takidu / takadat / tūṭū” resemble solkaṭṭu (Carnatic rhythmic syllables) and/or drum mnemonics. Siddhars sometimes encode counts and cycles (breath measures, bandha timing, heating stages) in rhythmic patterns. The final line may therefore be not mere filler but a time-code: practice/processing done to a strict internal tāḷa.

The verse does not fully disclose “what” is being prepared or practiced; it stresses “how”: correct containment, correct timing, correction of errors, and disciplined rhythm—whether in the laboratory vessel or in the body-vessel.