Wormwood is a plant that gives a liquid which is very bitter to drink. Together "wormwood" and "bitterness" represent severe suffering. (See: [[rc://en/ta/man/translate/figs-doublet]] and [[rc://en/ta/man/translate/figs-metaphor]])
The author speaks of his deep sadness and despair as if he were bowed down. AT: "I am depressed" or "I am discouraged" (See: [[rc://en/ta/man/translate/figs-idiom]])
# But I call this to mind
This means to intentionally think about something. The word "this" refers to something that the author will start to speak about in the next verse. AT: "But I choose to think about this" or "But I remember this"