consummate, accomplish, attain, commit (suicide)
遂 centers on carrying something through to its end: consummating, accomplishing, or attaining a goal. The 'commit (suicide)' sense is a specific, often negative, application of this idea of final completion.
遂 combines 辶 (movement) with 㒸, which likely contributes the sound and the idea of following through to completion. The exact historical development of 㒸 is uncertain.
The movement radical 辶 suggests going forward, and the inner 㒸 looks like a pig with extra strokes, as if driving livestock all the way to market. Picture pushing through until the task is fully accomplished.
For スイ, imagine finally accomplishing a task and letting out a satisfied 'sweeet!' — the sound 'swee' cues スイ as you reach the end.
finally; in the end; at last
accomplishment; execution
to accomplish; to achieve; to carry out
failed attempt (at a crime, suicide, etc.)
successful execution; accomplishment; completion; fulfillment; carrying through
to accomplish; to achieve; to complete; to carry out; to carry through
to accomplish; to finish; to carry through; to follow through
already finished (action); already accomplished
to remain married for life; to live as a married couple until death
to accomplish; to finish; to fulfill
to die peacefully; to have lived a full life
attempted rape
to achieve one's desire
attempted extortion; extortion attempt
attempted assassination
attempted crime
business operations; performing a job; carrying out duties
attempted murder
attempted suicide
to make progress; to develop; to evolve (method, style, etc.)