Which word means, 'mutual trust and friendship among people who spend a lot of time together'?

Which word means, 'seeming difficult to deal with in anticipation; intimidating'?

Which word means, 'a situation or action filled with/will likely result in something undesirable'?

Which word means, 'of importance; crucial'?

Which word means, 'the ability to recover quickly from difficulties; toughness'?

Which word means, 'suppose that something is true without having evidence to confirm it'?

Which word means, 'a risky or daring journey or undertaking'?

Which word means, 'form a theory or conjecture about a subject without firm evidence'?

Which word means, 'invent or concoct (something), typically with deceitful intent'?