An ascent is a climb or upward movement — the ascent of the north face. Assent is agreement or official approval — royal assent. One goes up, the other says yes, and they sound identical.
The core difference
An upward movement and an act of agreement.
- ascent — a climb: a steep ascent, the ascent to power.
- assent — agreement: nodded assent, royal assent.
The roots
Ascent is from Latin ascendere, to climb — the same root as ascend and ascendant. Assent is from assentire, to agree, related to sentiment and consent. Two clear families, and matching the word to its family fixes the spelling.
Royal assent
The formal approval by which a bill becomes law in the UK and other Commonwealth realms. It takes assent, and "royal ascent" would describe someone climbing something.
Frequently asked questions
Which one means agreement?
Assent. An ascent is a climb.
What is royal assent?
The formal approval by which a bill becomes law in the UK and other Commonwealth realms.
How do I remember them?
Ascent goes with ascend; assent goes with consent. Match the family.