“Sagar samuday” can mean two different things in Jain context. Please see which one you want:

1) Sāgar (Sāgaropama)

• Meaning: An extremely vast unit of time used in Jain time‑cycle (kālchakra).
• Use: Describes very long durations like the gaps between Tīrthankars or phases of avasarpiṇī/utsarpiṇī.
• Essence: It shows how immeasurable worldly time is compared to the timeless nature of the Soul.

2) Samudaya (Karmic aggregation/arising)

• Meaning: The coming together and rising of karmas that produce worldly experiences.
• Related terms: Uday (rise of karma), Upasham (subsidence), Kshaya (destruction), Kshāyopasham (mixed state).
• Essence: Bondage happens by samudaya of passions (kaṣhāyas) and activities; liberation happens by stopping influx (saṃvara) and shedding (nirjarā).

If you specify which one you need detailed explanation (with traditional definitions and examples), I will share it accordingly.