| complaire | please |
| Complaisamment | Clement |
| complaisance | complaisance |
| complaisant | attentive |
| Complementary metal oxide semi-conductor | CMOS |
| complet | complete |
| Complet-veston | Suit |
| Completely knocked down | Complete knock down |
| Complex instruction set computer | Complex instruction set computer |
| complexation | complex formation |
| complexe | difficult |
| Complexe activé | Activated complex |
| Complexe archéologique bactro-margien | Bactria-Margiana Archaeological Complex |
| Complexe balnéaire | Beach resort |
| complexe d'infériorité | inferiority complex |
| complexe d'Électre | Electra complex |
| complexe d'Œdipe | Oedipus complex |
| Complexe de Carney | Carney complex |
| Complexe de la Fédération | Federation Tower |
| complexe de supériorité | superiority complex |
| Complexe d’Électre | Electra complex |
| Complexe funéraire de Djéser | Pyramid of Djoser |
| Complexe militaro-industriel japonais | Defense industry of Japan |
| Complexe nucléaire Mayak | Mayak |
| Complexe simplicial | Simplicial complex |
| Complexe sportif de Fès | Fez Stadium |
| Complexe sportif Moulay Abdallah | Stade Moulay Abdellah |
| complexifier | complexify |
| complexion | complexion |
| complexité | perplexity |
| Complexité algorithmique | Computational complexity theory |
| Complexité de Kolmogorov | Kolmogorov complexity |
| Complexité irréductible | Irreducible complexity |
| Complexo Desportivo Municipal de Barcelos | Estádio Cidade de Barcelos |
| complication | entanglement |
| Complications de la grossesse | Complications of pregnancy |
| complice | accessory |
| Complice de | Tributary |
| complicité | complicity |
| complicité tacite | conspiracy of silence |
| complies | compline |
| compliment | congratulation |
| complimenter | congratulate |
| complimenteur | flatterer |
| complimenteuse | flatterer |
| compliments | congratulations |
| compliquer | perplex |
| compliqué | difficult |
| complot | scheme |
| Complot de famille | Family Plot |
| Complot de Rye-House | Rye House Plot |
| Complot papiste | Popish Plot |
| comploter | scheme |
| comploteur | conspirator |
| complètement | plain |
| complètement affolé | scared to death |
| Complètement gelé | Frozen solid |
| complètement immobile | stock-still |
| complètement insensé | past all reason |
| complètement paf | smashed |
| complètement retourné | upset |
| complément | complement |
| complément adverbial | adverbial |
| complément d'objet direct | direct object |
| complément d'objet indirect | dative case |
