A guttural is substituted for the h in han 'to kill' after reduplication also.,
As जिघांसति, जङ्घन्यते, अहं जघान ॥ The rule applies when such an affix follows which causes the reduplication of the stem (anga) हन्, therefore not here हननीयितुमिच्छाति = जिहननीयिषति ॥,