Sūtra 1-32
तत्प्रतिषेधार्थमेकतत्त्वाभ्यासः। (३२)
Tatpratiṣedhārthamekatattvābhyāsaḥ. (32)
(Tat-pratiṣedha-artham eka-tattva-abhyāsaḥ) (32)
(Let there be) practice of a single principle for removal of these (disease, pain etc.,)

Sūtra words
Tat-pratiṣedha-artham eka-tattva-abhyāsaḥ

Word Formation
Tat-pratiṣedha-artham — a ṣaṣṭhī (sixth case) tatpuruṣa compound resolved as teṣām  pratiṣedha-artham. pratiṣedha-artham is a compound of  pratiṣedha and artham. pratiṣedha – (prefix) prati + (verb) sidh + (suffix) a.
eka-tattva-abhyāsaḥ — a ṣaṣṭhī (sixth case) tatpuruṣa compound resolved as ekatattvasya abhyāsaḥ.
eka-tattva also is a compound, karmadhāraya, resolved – ekam ca tattvam ca.
Abhyāsa – (prefix) abhi + (verb) as + (suffix) a.
tattva – (pronoun) tat + (suffix) tva

Meaning of words
Tat-pratiṣedha-artham – For removal of that.. tat that (referring to obstacle detailed in 1-30)
pratiṣedha negation, removal
pratiṣedha-artham – for removal The term artha is used at the end of a compound to mean ‘for the sake of’
eka-tattva-abhyāsaḥ’- Practice one principle
eka one
tattva principle, truth
abhyāsa practice.