In the following question, choose the one-word substitute for the given phrase: A lover of work.

Introduction / Context:
This is a one-word substitution question where the candidate must select a single term that captures the meaning of the given descriptive phrase. The phrase A lover of work refers to someone who likes working very much and may even be enthusiastic about staying busy with tasks. Understanding the meanings of different phile words helps in answering such questions correctly.

Given Data / Assumptions:
- Phrase: A lover of work.
- Options: Oenophile, Technophile, Romanophile, Ergophile.
- All the options end with phile, a suffix that indicates a lover of or enthusiast for something.
- We need the option whose prefix relates to work.

Concept / Approach:
The suffix phile comes from Greek and means lover of. The prefix ergo or ergon relates to work. Therefore, Ergophile means a person who loves work or is extremely fond of working. Oeno refers to wine, techno to technology, and Romano to Rome, so the other options relate to lovers of wine, lovers of technology and lovers of Rome respectively. Matching the correct prefix with the idea of work leads straight to Ergophile.

Step-by-Step Solution:
Step 1: Recognise that phile means lover of, so each option names a person with a strong liking for something.Step 2: Connect the phrase lover of work with the Greek root ergo, which refers to work or labour.Step 3: Note that Ergophile combines ergo with phile and therefore literally means lover of work.Step 4: Understand that Oenophile refers to a lover of wine, not a lover of work.Step 5: Technophile refers to someone who loves technology, and Romanophile to someone who admires Rome or Roman culture.Step 6: Thus, Ergophile is the only option that correctly matches the phrase A lover of work.

Verification / Alternative check:
Reference works in English vocabulary and word formation confirm that erg is used in words related to work, such as ergonomics, the science of designing workplaces for efficiency and safety. Similarly, the term workaholic is sometimes used informally for a person who cannot stop working, but the precise one-word substitute based on Greek roots and the suffix phile is Ergophile. None of the other options share this root, so there is no ambiguity.

Why Other Options Are Wrong:
- Oenophile means a lover of wine or someone interested in wine appreciation.
- Technophile means a person who loves or is very enthusiastic about technology and gadgets.
- Romanophile is someone who admires Rome, Roman culture or things related to Rome.

Common Pitfalls:
Learners may be tempted to guess based on the overall look of the word instead of understanding its parts. They may also confuse Ergophile with similar sounding words if they have not studied roots systematically. A useful strategy is to break down such words into prefix and suffix and connect them with known English words, such as ergonomics for work related design and audiophile for lover of high quality sound. This approach makes it easier to decode unfamiliar words in exams.

Final Answer:
The correct one-word substitute for A lover of work is Ergophile.