Is a VIABLE plan doable or not doable?

A man who believed himself i...................., too strong to be defeated or destroyed.

Since covid brakout most of us have been c.................. to our homes. (= limited to, closed)

He was standing with his feet wide, trying to keep the boat from c.................. (= turning upside down)

B............................ support sessions may be offered after the death of a close person.

John was in a b...................... mood, for his plans were going well. (= full of optimism and positive energy)

Is STRIFE a negative conflict or a positive exchange of ideas?

1. zatwardziały, niereformowalny ( ~ sinner or criminal) 2. nieodwracalny (~ evil or tragedy) 3. niepodlegający zwrotowi (~ paper money). What`s the ONE WORD for all these meanings? Ir...........................

"Does she care?" It was a question that loomed l.................. in his mind. (appeared as very important)

Everybody's got something that will seem like an i................................... challenge. (= not possible to be overcome)