Visuddhimagga XVI-17

Saṃ-iti ca ayaṃ saddo ‘‘samāgamo sameta’’ntiādīsu (dī. ni. 2.396; vibha. 199) saṃyogaṃ dīpeti.

其次（集），「三」的音，如用在「三曼格摩、三妹等」（[PTS 495]来集、集结）的诸字中，是表示集合的意思，

Ñ(XVI,17): [Samudaya (origin):] the word sam (= prefix 'con-') denotes connection, as in the words samāgama (concourse, coming together), sameta (congregated, gone together), and so on.

U-iti ayaṃ ‘‘uppannaṃ udita’’ntiādīsu (dha. sa. 1; mahāva. 84) uppattiṃ.

「邬」的音，如用在「邬本能、邬地等」（生起、上升）诸字中，是表示生起之意。

Ñ: The word u denotes rising up, as in the words uppanna (arisen, uprisen), udita (ascended, gone up), and so on.

Aya-saddo kāraṇaṃ dīpeti.

「阿耶」的音，是表示原因之意。

Ñ: The word aya denotes a reason (kāraṇa).

Idañcāpi dutiyasaccaṃ avasesapaccayasamāyoge sati dukkhassuppattikāraṇaṃ.

而此第二集谛是表示和其它的缘集合之时为生起苦的原因。

Ñ: And this second truth is the reason for the arising of suffering when combined with the remaining conditions.

Iti dukkhassa saṃyoge uppattikāraṇattā dukkhasamudayanti vuccati.

如是因为集合而为生起苦的原因，所以说是「苦之集」。

Ñ: So it is called dukkha-samudaya (the origin of suffering) because it is the reason in combination for the arising of suffering.