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Code & Deliveryverb · /diːˈbʌɡ/

debug

In simple English

In software development, debugging is a critical skill that involves running code, examining its behavior, and using tools to locate where things go wrong. Developers debug by using print statements, debuggers, breakpoints, and code review. When a feature is broken or behaves unexpectedly, engineers debug the code to understand the root cause. This process can take hours or just minutes depending on complexity. In tech workplaces, debugging happens daily—you might spend time debugging after a failed test, during code review, or when a production issue arises. Team members often say they are going to debug something, meaning they are about to investigate and fix a specific problem.

Understand what debugging means and how developers find and fix code errors

At a glanceCEFR B2
Commonness5/5
Versatility4/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

✓Let me debug this real quick.
✓I spent all afternoon debugging that crash.
✓We need to debug before we ship.

Real examples

in a standup

"I am going to debug the login issue that came in yesterday."

in a code review

"Have you debugged this function to see what is causing the timeout?"

in a team meeting

"The QA team found a bug, so our backend team will debug it this week."

Don't say this

Handle with care. Do not use debug to mean fix in general contexts—it specifically refers to finding and removing code errors. Also avoid saying debug as a noun without context (say 'a debugging session' instead of 'a debug').

✕I debugged the entire application.
✓I debugged the authentication module.— Debug is specific to finding code errors, not fixing everything. Be precise about what you debugged.
✕Can you debug why the server is slow?
✓Can you debug why the database query is slow?— Debug refers to finding defects in code logic, not general performance tuning. Point to the specific code issue.
✕I debugged it with a debugger tool.
✓I used a debugger to debug the code.— Avoid repeating the same word; use varied language (e.g., 'I used a debugger to debug...' or 'I debugged using breakpoints').

Other forms

verb (present)

debug

"I debug the code every morning."

verb (past)

debugged

"She debugged the issue last night."

verb (gerund)

debugging

"Debugging is a critical skill for developers."

noun

debug

"We scheduled a debug session for tomorrow."

Often used with

debug a bugFind and fix a specific bug in code
debug the codeExamine and fix errors in source code
debug an issueInvestigate and resolve a problem
debug a crashFind the cause of a software crash
debugging toolsSoftware used to find code errors (debuggers, breakpoints)

Similar words

fixMore general; can mean repair anything. Debug is specific to code errors.
troubleshootBroader term for solving any problem. Debug is specific to code investigation.
traceFollow code execution step-by-step; part of debugging but not the whole process.

Opposites

introduce a bugbreak the code

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Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your application is crashing on startup. What is the most natural way to say it in a team meeting?

Complete the sentence

2. I spent three hours _______ the authentication module before I found the issue. (use past tense of debug)

Spot the mistake

3. Which sentence uses debug incorrectly?

Rewrite naturally

4. Rewrite this in natural tech English using debug: 'We need to look at the code carefully to find out why it is not working and fix it.'

Questions

Quick poll

Have you said "debug" in a standup this week?

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