the boy was acting very safe.
Safe can be an adjective. It is also a noun.
The children were found safe and sound inside the house.
The Mesopatamians used the phalax to keep their children safe.
'He reached safe.' is incorrect. The noun 'safe' is a word for a metal strongbox. I don't think that he was reaching for a safe. If he was, then it should say 'a safe' or 'the safe'. The other use of the word 'safe' is an adjective, a person can't reach for an adjective. The noun form for the adjective 'safe' is 'safety'. A correct sentence is 'He reached safety.' (a safe place).'Please speak loud.' is technically correct, the word 'loud' is an adverb but it sounds a bit clumsy. Alternates are 'Please speak loudly.' or 'Please speak aloud.' Both 'loudly' and 'aloud' are also adverbs which can modify the verb 'speak'.
terrorist will not find a safe haven here.
The correct phrase is "get home safely." In this context, "safely" is an adverb that describes how one should get home. Using "safe" would be grammatically incorrect, as "safe" is an adjective.
I can give you several sentences.I have home and automobile insurance.His insurance that we would be safe didn't make me feel much better.Your helmet gives insurance against a head injury.
Your letter is in the large green safe. You might say that it is quite safe while it is in that safe. I hope that it is safe to play outside today.
if you are more safe you are saferif you are less safe you are dangerous/vulnerable
my cat looks safe in her cage
The ball player slid home and was called "safe." Are you safe in your house?
**Use it as a adjective**Water is a nonflammable liquid. **Use it a noun** Firemen must use nonflammable liquids to put out a fire.