Answer:
一 -> 二 -> テ -> 示 -> 祭 -> 察 -> 擦
一 ICHI, ITSU, hito(tsu) - one
二 NI, futa(tsu), futa - two
テ Katakana "Te"
示 JI, SHI, shi(mesu) - show
祭 SAI, matsu(ru), matsu(ri) - deify, worship, festival
察 SATSU - surmise, judge, understand
擦 SATSU, su(reru), su(ru) - rub, chafe, become worn