[reru ; rareru](aux-v, v1) (1) (れる for 五段 verbs, られる for 一段. Follows the imperfective form of (v5) and (vs) verbs) (See 未然形, 迷惑の受身・めいわくのうけみ) indicates passive voice (inc. the "suffering passive"); (2) (no imperative form. Infrequently used in modern Japanese, e.g. 歩ける is favoured over 歩かれる) (See ら抜き言葉・らぬきことば) indicates the potential form; (3) (no imperative form) indicates spontaneous occurrence; (4) (hon) (no imperative form) used as an honorific for others' actions#41[Add to Longdo]
[u](aux-v) (1) (after the imperfective form of certain verbs and adjectives) indicates speculation; (2) indicates will; (3) indicates invitation#63[Add to Longdo]
[seru ; saseru](aux-v, v1) (1) (せる is for 五段 verbs, させる for 一段; follows the imperfective form of (v5) and (vs) verbs; senses 1-3 of せる are sometimes abbreviated as 〜す) auxiliary verb indicating the causative; (2) (hum) (usu. as 〜(さ)せてもらう, 〜(さ)せていただく, etc.) auxiliary verb indicating that one has been granted the permission to do something; (3) auxiliary verb used to make verbs more "active"; (4) (hon) (as 〜(さ)せられる, 〜あら(さ)せられる, 〜(さ)せ給う, etc.) auxiliary verb used as an extreme honorific for others' actions#540[Add to Longdo]