The six infinite means of crossing the sea of mortality, i. e. the six pāramitās 六度.

A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous

即六波羅蜜。波羅蜜（梵 pāramitā），舊譯作度。以菩薩六度之行法無窮無極之故，又稱度無極。〔增一阿含經卷一〕

佛光電子大辭典

p1277

六度無極===（名數）六波羅蜜也。波羅蜜舊譯為度，或譯為度無極。菩薩六度之行法無窮極，故曰度無極。

丁福保《佛學大辭典》

六度無極 (liù dù wú jí) 　( lit. “the six types of crossing over into infinitude” “the six pāramitās, the six supreme virtues, leading to Buddhahood” ) Cf. 度無極(dù wú jí), 六度(liù dù), 五度無極(wŭdùwújí) ;

{not found at 《漢語大詞典》2.37.} ; {not found at 《大漢和辞典》2.71.} ;

Dharmarakṣa: {65c25} 有如來，號日月燈明………爲諸菩薩、大士之衆顯揚部分，分別六度無極、無上正眞(p)

{K.17.15} ṣaṭ-pāramitā-

Kumārajīva: {L.3c25} 六波羅蜜

Dharmarakṣa: {66a7}

{K.18.13} do.

Kumārajīva: {not found at L.4a1}

Dharmarakṣa: {99b27} 法之供養者，………精進力行不退轉輪，現於六度無極之慧，慇懃攬攝佛之道品(p)

{K.224.1-}

Kumārajīva: {not found at L.30b29}

Dharmarakṣa: {105a29} 吾……時作國王，遵修大法、六度無極(p)

{K.256.10} ṣaṣ~ pāramitā~

Kumārajīva: {L.34b27} 六波羅蜜

Dharmarakṣa: {105b20}

{K.259.3} do.

Kumārajīva: {L.34c27} do.

Dharmarakṣa: {122c13}

{K.376} ṣaṭ-p°

Kumārajīva: {L.50c6} do.

Dharmarakṣa: {128a14}

{K.431.8-}

Kumārajīva: {not found at L.56a5}

Dharmarakṣa: {131a10} 又其二子……勤心專精六度無極(p)

{K.457.10f} dāna-pāramitā~ ... śīla-p°... kṣānti-p° ... vīrya-p° ... dhyāna-p° ... prajñā-p°

Kumārajīva: {L.59c6} 檀…尸羅…羼提…毘梨耶…禪…般若波羅蜜

A Digital Edition of A Glossary of Dharmarakṣa translation of the Lotus Sutra by Seishi Karashima, 1998