One literary device that Stevie Smith uses in the poem "Not Waving but Drowning" is irony. The irony in the poem is evident in the juxtaposition between the literal act of waving and the figurative meaning of drowning. The speaker is not actually waving but drowning, and this contradiction between appearance and reality creates a sense of irony.
The use of irony can be seen throughout the poem, but is most prominent in the lines: "I was much further out than you thought / And not waving but drowning." Here, the speaker is emphasizing the misunderstanding and misinterpretation of his situation by others. While they may have thought he was simply waving, he was actually struggling and drowning.
This use of irony adds depth to the overall theme of the poem, which centers around the idea of isolation and miscommunication. By highlighting the disconnect between the speaker's outward actions and inner struggle, the poem underscores the theme of loneliness and the inability to truly understand or connect with others. The irony serves to emphasize the tragic nature of the speaker's situation, as he is ultimately misunderstood and overlooked, even in his darkest moments.
In conclusion, the use of irony in "Not Waving but Drowning" enhances the poem's theme of isolation and miscommunication by drawing attention to the stark contrast between appearance and reality. Through the use of this literary device, Stevie Smith effectively conveys the poignant message of the poem.