Which term describes someone who is easily angered?

The term that describes someone who is easily angered is "irascible." This word derives from the Latin term "irasci," which means "to be angry." An irascible person tends to have a short temper and can become angry quickly over minor irritations. This characteristic can make interpersonal interactions challenging, as an irascible individual may react disproportionately to situations that may not warrant such a strong emotional response.

In contrast, the other options provided refer to different traits: "irresolute" pertains to someone who is uncertain or indecisive; "laconic" describes a person who uses very few words or is terse in their speech; and "inure" means to become accustomed to something unpleasant or to develop sensitivity to it. None of these terms convey the idea of being easily angered, which solidifies "irascible" as the appropriate choice.