pondering
pon-der-ing
verb
Thinking deeply and carefully about something, often a difficult decision or question.
"He sat pondering the complex problem."
noun
The act or period of deep, careful thought about a particular subject or issue.
"After much pondering, she made her choice."
Thesaurus
Synonyms: brooding, broody, thoughtful, meditative, contemplative, reflective, musing, ruminative, pensive