The antonyms for the word "thinskinned" are thick-skinned, insensitive, callous, tough, and resilient. Thick-skinned suggests that someone is not easily hurt or offended by criticism or insults. Insensitive refers to a person who is indifferent or lacking in sensitivity towards others' feelings. Callous suggests a person being insensitive to the needs or concerns of others. Tough implies someone is strong-willed and can endure challenging situations. Finally, resilient refers to someone who is able to bounce back quickly from difficult circumstances. All these antonyms could be used to describe people who do not take things personally, are not easily affected by criticism, or are unbothered by insults.