Additional: Definition, Usage & Common Mistakes

Meaning 1：extra (additional)

additional 🔊

/əˈdɪʃənl/

adj.

More of something that you already have.

extra 🔊

➕

/ˈɛkstrə/

adj.

Describes something that is added on or provided in addition to what is already present or planned.

📁 Category：School Education 🔖 Level：初级

📘 Details & Usage

📖 Root Explanation

From Latin ‘addere’ (to add) + the suffix ‘-al’ (relating to).

💡 Mnemonic

Think of 'ADDition' + 'al' – it's ADDiTIONAL stuff you ADD on.

📖 Example

The project required additional research beyond the basic facts we learned in class. 🔊 The project required extra research beyond the basic facts we learned in class.

🔗 Collocations

additional cost – extra expense beyond the original price

additional information – further details or data

additional time – more time granted beyond the standard limit

🔄 Synonyms

extra (adj.) – More than is usual, expected, or necessary.

supplementary (adj.) – Provided in addition to what is already present.

further (adj.) – Additional to what already exists or has been dealt with.

🌱 Derivatives

add (v.) – To join or combine something with something else.

addition (n.) – The process or result of adding something.

additionally (adv.) – Used to introduce an extra point or item.

📖 Cultural Story

Derived from Latin ‘additionalis’, meaning ‘something that is added’. It entered English in the 17th century, reflecting a growing need in legal and commercial language to specify supplementary items beyond a principal agreement or base list.