wonder at something, fear someone or something

2. VERB

If you wonder at something, you are very surprised about it or think about it in a very surprised way.

• Walk down Castle Street, admire our little jewel of a cathedral, then wonder at the castle.    
• We all wonder you're still alive.

cf.

1. VERB

If you wonder about something, you think about it, either because it interests you and you want to know more about it, or because you are worried or suspicious about it.

• I wondered what that noise was.     
• 'He claims to be her father,' said Max. `We've been wondering about him.'.     
• But there was something else, too. Not hard evidence, but it made me wonder.

fear someone or something:

2. VERB

If you fear someone or something, you are frightened because you think that they will harm you.

• Many people fear change because they do not like the old ways to be disrupted.

cf. 

4. VERB

If you fear something unpleasant or undesirable, you are worried that it might happen or might have happened.

• She had feared she was going down with pneumonia or bronchitis.     
• More than two million refugees have fled the area, fearing attack by loyalist forces.

6. VERB

If you fear for someone or something, you are very worried because you think that they might be in danger.

• Carla fears for her son.     
• He fled on Friday, saying he feared for his life.

...... Cobuild