The decision on whether Bouygues SA is suitable for issuing hybrid bonds depends on several financial health indicators:

1. **Profitability & Stability**:  
   - Revenue grew from €37,589m (2021) to €44,322m (2022).  
   - Profit for the period decreased from €1,305m to €1,131m, but still solid.  
   - Recurring operating profit improved from €1,693m to €1,962m, indicating a resilient core business.

2. **Leverage & Debt Capacity**:  
   - Net debt increased significantly from €941m to €7,440m, mainly due to acquisition activity.  
   - Long-term borrowings doubled from €5,805m to €11,586m.  
   - Still, the equity base is strong at €13,932m (2022), and the equity ratio remains acceptable (~23%).  
   - Interest expense is manageable relative to operating profit.

3. **Cash Flow Generation**:  
   - Operating cash flow remained robust at €2,978m in 2022 (down from €3,576m but still covering capex and dividends).  
   - Negative free cash flow after investing activities due to large acquisitions, but this is exceptional.

4. **Credit Profile**:  
   - Large, diversified group with investment-grade characteristics.  
   - Stable shareholder structure and strong market position in construction, telecom, and media.

5. **Hybrid Bond Suitability**:  
   - Hybrid bonds require a stable, predictable cash flow to support ongoing coupon payments, and enough equity cushion to absorb potential subordination.  
   - The increase in leverage and net debt is notable, but total equity and recurring profitability provide support.  
   - Given the temporary nature of the acquisition-driven debt spike and strong operating fundamentals, a hybrid issuance is clearly feasible, though slightly riskier than in previous years.

Given this analysis, Bouygues falls into a **Marginally Suitable** category—solid fundamentals but increased leverage post-acquisition requires monitoring.

<answer>Marginally Suitable</answer>