(By Hedvig Skirgård): "Suppletion is a process where a lexeme is changed in such a way that the new form does not resemble the previous when it appears in a different position in the paradigm. An example of this is English went and go. In this case, the verb is suppletive for tense. Only so called 'strong suppletion' counts here, 'weak' suppletion is not included. ❡
Only answer 1 if there are more than three examples of strong suppletion. Body parts and kinship terms are a good place to start investigating."