Expressions used in Everyday Spoken English in Social and Professional contexts
If you are 'prone' to something it means you have a natural inclination or tendency towards something. Being 'prone to' or 'susceptible to' something can mean that you are vulnerable and likely to suffer from a particular setback or demonstrate particular negative characteristics. You might be 'prone to hayfever' or 'prone to headaches' for example or be 'prone to becoming frustrated'. If you are 'susceptible' to something it means you are easily influenced or harmed by something or somebody. Your boss might be 'susceptible to suggestions' or 'susceptible to flattery' for example. The adjective susceptible is usually used to describe someone or something who is easily influenced.