名词

1. the emergence of a tooth as it breaks through the gum

2. a sudden very loud noise

Synonym: bangclapblastbam

3. a sudden violent spontaneous occurrence (usually of some undesirable condition)

e.g. the outbreak of hostilities

Synonym: outbreakirruption

4. the sudden occurrence of a violent discharge of steam and volcanic material

Synonym: volcanic eruption

5. (of volcanos) pouring out fumes or lava (or a deposit so formed)

Synonym: eructationextravasation

6. symptom consisting of a breaking out and becoming visible