In Jain philosophy these two terms belong to the topic of āsrava (influx of karma). Very simply:

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1. Sāmparāyik āsrava / kriyā

• Meaning: Influx of karma with passions (kaṣāya) like anger, pride, deceit, greed – i.e. with rāga–dveṣa (attachment–aversion).
• Effect:

- This karma sticks to the soul and becomes real bandha (bondage). - It extends saṃsāra (cycle of birth and death).

• Cause:

- Activities of mind, speech and body done with likes–dislikes, carelessness, violence, lies, greed, etc.

• In Tattvārtha Sūtra this is called sāmparāyika āsrava, and its sub‑divisions include various kriyās (activities) like mithyātva-kriyā, prāṇātipātikī-kriyā, etc.

So, samparāyik (sāmparāyik) = harmful, passion‑coloured influx causing bondage.

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2. Iryāpathik āsrava / kriyā

Here two closely related usages appear in Jain texts:

(a) Iryāpath āsrava (general type)

• Meaning: Influx of karma that arises only from movement/activity,

without passion (no rāga–dveṣa), in a very pure, careful state.

• Effect:

- Such karma does not really bind the soul; it is called “non‑affecting”. - Whatever karmic particles come in, go out again quickly; they do not extend saṃsāra.

• Typical for:

- Very pure monks or arihants, who move only with utmost awareness and no inner disturbance.

So, iryāpathik āsrava = neutral/pure influx caused by passionless movement, not leading to real bondage.

(b) Iryāpath‑kriyā (one of the 25 sāmparāyik activities)

• In the list of 25 kriyās under sāmparāyik āsrava, “iryāpath‑kriyā” is named.
• There it means: careful walking / careful movement, looking at the ground to avoid himsā.
• If this careful movement is done with some subtle attachment or pride, it is counted among the sāmparāyik activities;

if done in complete passionlessness, its inflow is called iryāpathik āsrava (non‑binding).

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Core difference in one line

• Sāmparāyik kriyā / āsrava:

Karma inflow with passions, which binds the soul and lengthens saṃsāra.

• Iryāpathik āsrava / kriyā (in pure sense):

Karma inflow caused by mere movement without passions, which does not truly bind and does not lengthen saṃsāra.

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Digambar and Śvetāmbara view

• Both traditions accept this basic distinction:

- Sāmparāyik = passion‑coloured, binding influx. - Iryāpathik = passionless, non‑binding (or extremely light) influx.

• Wording and examples may differ slightly in commentaries, but the spiritual meaning is the same in both.

In practice, for us as sādhakas: Whenever there is even a little rāga–dveṣa, our activity becomes sāmparāyik (binding). The more we act with pure awareness, without attachment/aversion, the closer we come to iryāpathik‑type non‑binding activity.