Based on the financial data, Bouygues SA shows several positive attributes for issuing hybrid bonds: strong operating cash flow (€2.98 bn in 2022‑2023), a solid interest‑coverage ratio (EBIT of €1.96 bn against total interest expense of €0.29 bn, giving coverage of roughly 6.7×), and a manageable net‑debt‑to‑EBITDA ratio of about 1.6×. The company also has a diversified revenue base (total revenue €44.3 bn) and a substantial equity cushion (total equity €13.9 bn). However, there are notable concerns: net debt jumped dramatically from €0.94 bn to €7.44 bn in one year, indicating a rapid increase in leverage. Moreover, the equity ratio is moderate (≈23 %) and, after accounting for large goodwill (€12.6 bn) and other intangible assets (€3.97 bn), tangible equity is effectively negative, suggesting limited “hard” equity to absorb losses. The heavy reliance on goodwill and the significant acquisition spending (cash outflows for obtaining control of subsidiaries of €6.27 bn) introduce execution risk and raise questions about future cash‑flow stability. While the company meets basic thresholds for hybrid issuance, the combination of swiftly rising debt and high intangible assets places it in a borderline position.

Overall, Bouygues SA could issue hybrid bonds but faces material risks that limit its suitability. The most appropriate classification is **Marginally Suitable**.

<answer>Marginally Suitable</answer>