Final answer:
In 'Song of Myself' by Walt Whitman, the bolded words have the following contextual meanings: graft - to combine or integrate, transpire - to be revealed, dark mottling - to mark with spots.
Step-by-step explanation:
- To combine or integrate: In the first excerpt, the bolded word 'graft' is used metaphorically to mean combining or integrating something new into oneself.
- To be revealed: In the second excerpt, the bolded word 'transpire' means to become known or revealed, often referring to information or secrets.
- To mark with spots: In the third excerpt, the phrase 'dark mottling' refers to marking or spotting with dark colors.