credible

Able to be believed; convincing; worthy of trust or confidence.

• credibility/ˌkrɛdɪˈbɪləti/(n)可信度
• credibly/ˈkrɛdɪbli/(adv)可信地

• credible source
• credible threat
• credible evidence
• credible witness
• credible explanation

1. 1.The intelligence agency assessed the threat as credible and raised the security level. (believable)
2. 2.Without credible evidence, the prosecution's case fell apart. (trustworthy)

• plausible/ˈplɔːzɪbl/— seeming reasonable — but may not be true
• reliable/rɪˈlaɪəbl/— consistently good, can be trusted
• convincing/kənˈvɪnsɪŋ/— persuasive, believable

from Latin "credibilis" (worthy of belief) — "credere" (to believe)