The Greek adverb allachothen means "from another place" or "by another way." It appears once in John 10:1, in Jesus' parable of the sheepfold — one who enters "another way" is a thief.
Jesus' parable of the Good Shepherd draws a critical distinction: the one who enters the sheepfold through the gate is the shepherd; the one who comes in allachothen — "from another place," over the wall — is a thief and robber. This has profound theological implications for soteriology: there is no alternative entry into salvation. Jesus declares in John 10:9, "I am the gate" — not one gate among many, but the only way. All religious systems that bypass Christ are climbing in another way.