Answer

Yes. In Jain tradition, Arham is a sacred Jain mantra/seed-syllable, closely linked with the Arihant/Arhat—the being who has conquered inner enemies and is worthy of supreme reverence. Its traditional origin is tied to the Jain idea of arhat / arihaṃt / arihant, and some Jain explanations also connect it with the Sanskrit root arha- meaning “worthy” or “deserving.” ( jainastudies.soas.ac.uk)

Explanation

If you mean the exact syllable “Arham”, it is mentioned in Jain devotional and meditative literature, especially in later Jain texts. For example, Hemachandra’s Yogaśāstra explains it as the supreme mantra, and the Śvetāmbara Ṛṣimaṇḍalastotra includes the line “arhamityakṣaraṃ brahma…” describing Arham as a sacred syllable. Scholars also note that this seed syllable became especially prominent in medieval Jain practice and is often analyzed as beginning with the first sound of the alphabet and ending with the final sound, showing its symbolic completeness. ( jainqq.org)

Spiritual Understanding

In Jain spirituality, Arham is not treated as an ordinary word. It is a concentrated sacred sound pointing toward the qualities of the liberated or enlightened soul. In practice, it serves as a mantra for contemplation, purity, and inner elevation, while the older liturgical base remains the salutation to the Arihants in the Namokar tradition. ( mdpi.com)

Takeaway

So, in short: yes, Arham is a Jain word in sacred usage; its root is traditionally connected to Arhat/Arihant and the idea of being worthy; and yes, it is mentioned in Jain texts, especially in later mantra and meditation literature. ( jainqq.org)