English word credible comes from Proto-Indo-European *ḱred dʰeh₁-, and later Proto-Italic *krezdō (To believe.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *ḱred dʰeh₁- | Proto-Indo-European (ine-pro) | to place one's heart, i.e. to trust, believe |
| *krezdō | Proto-Italic (itc-pro) | To believe. |
| credere | Latin (lat) | |
| credibilis | Latin (lat) | Credible, worthy of belief, likely. |
| credible | Old French (842-ca. 1400) (fro) | |
| credible | Middle English (1100-1500) (enm) | |
| credible | English (eng) | Authentic or convincing.. Believable or plausible. |