在狱咏蝉

西陆蝉声唱，

西陆指秋天，古人以太阳运行至西陆为秋。蝉声唱点明季节，以秋蝉鸣叫起兴，营造凄清氛围，为全诗托物言志奠定基调。

Xilu refers to autumn in ancient Chinese astronomy. The singing cicada opens the poem with seasonal imagery, creating a bleak mood and setting up the poem's allegorical mode.

南冠客思深。

南冠用《左传》楚囚钟仪戴南冠的典故，代指囚徒。客思深写诗人身为囚徒的深沉乡愁与忧思，将自身处境与蝉鸣相映。

The 'southern cap' alludes to the Chu prisoner Zhong Yi in the Zuo Zhuan and becomes a trope for a captive. 'Deep thoughts' expresses the poet's homesickness and grief as a prisoner.

不堪玄鬓影，

玄鬓本指黑色鬓发，此处借指蝉的黑色形影，也暗含青春黑发之意。不堪写诗人不忍面对蝉影，因它触动自身年华与身世之悲。

Dark temples literally mean black hair; here they evoke the cicada's dark form and also suggest youth. The poet can hardly bear the sight because it stirs grief over his own age and fate.

来对白头吟。

白头吟既是乐府曲名，相传为卓文君所作，多写哀怨；又直指诗人白发。蝉之玄鬓与人之白头对照，形成强烈反衬，突出囚徒的哀伤。

'Song of White Hair' is a yuefu title associated with lament, and it also points to the poet's white hair. The dark cicada is contrasted with the white-haired speaker, heightening his sorrow.

露重飞难进，

露重写秋露浓重，蝉翼沾湿难以高飞，象征环境险恶、仕途受阻。此句由咏蝉转入自喻，物我交融。

Heavy dew wets the cicada's wings so it can scarcely fly, symbolizing a hostile environment and blocked career. The poem moves from describing the insect to allegorizing the self.

风多响易沉，

风多写秋风纷杂，蝉声易被吹散淹没，喻谗言众多、正直之声难以上达。与上句对仗，进一步写处境艰难。

Many winds scatter and drown the cicada's song, a metaphor for numerous slanders and the difficulty of making an honest voice heard. It parallels the previous line to deepen the sense of oppression.

无人信高洁，

高洁既指蝉栖高饮露、古人视为高洁之物，也指诗人自守的品格。无人信直抒世道昏暗、知音难觅的悲愤。

'Lofty purity' describes the cicada, traditionally thought to perch high and feed on dew, and also the poet's own integrity. 'No one believes' voices outrage at a dark world with no true understanding.

谁为表予心。

谁为即谁替我，表予心即表明我的心迹。以反问收束全诗，将咏蝉与自辩合而为一，表达无人代为申雪的孤愤。

'Who will' means who will act on my behalf; 'speak for my heart' is to vindicate the speaker. The rhetorical question closes the poem, fusing cicada allegory with self-defense and lonely indignation.