The French verb for 'to like' or 'to love' is 'aimer'. This is a regular -er verb and is one of the most common verbs in French. 'Détester' means 'to hate' (the opposite), 'avoir' means 'to have', and 'comprendre' means 'to understand'. 'Aimer' can express both 'like' and 'love' depending on context.