ce : [conditional particle] if.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Ce [Vedic ced; ce=Lat. que in absque, ne -- c, etc., Goth. h in ni -- h. see also ca 3] conditional particle "if," constructed either with Indicative (ito ce pi yojanasate, viharati even if he lived 100 y. from here D i.117) or Conditional (tatra ce tumhe assatha kupitā D i.3), or Potential (passe ce vipulaŋ sukhaŋ Dh 290). -- Always enclitic (like Lat. que) & as a rule placed after the emphasized word at the beginning of the sentence: puññañ ce puriso kayirā Dh 118; brāhmaṇo ce tvaŋ brūsi Sn 457. Usually added to pronouns or pron. adverbs: ahañ ce va kho pana ceteyyaŋ D i.185; ettha ce te mano atthi S i.116, or combd with other particles, as noce, yañce, sace (q. v.). Freq. also in combn with other indef. interrog. or emphatic particles, as ce va kho pana if then, if now: ahañ ce va kho pana pañhaŋ puccheyyaŋ D i.117; ahañ ce va kho pana abhivādeyyaŋ D i.125; api (pi) ce even if: api ce vassasataŋ jīve mānavo Sn 589.

Pali-English Dictionary, TW Rhys Davids, William Stede,

ce: conj. 若

巴漢辭典 編者：(斗六) 廖文燦