The term 'Tirthankaras' in Jainism has its roots in the concept of spiritual guidance and enlightenment. The word is derived from "Tirtha," which means a ford or a crossing point in a river, and "kara," which means one who makes or causes. Therefore, 'Tirthankaras' are seen as spiritual teachers who enable followers to cross the river of existence, symbolizing the cycle of birth and death, and attain liberation. These enlightened beings are considered guides who have conquered worldly desires and attachments, leading by example to show the path of righteousness, non-violence (ahimsa), and spiritual realization. The concept reflects the Jain belief in the possibility of individual spiritual progress and liberation under the guidance of these revered spiritual teachers.

So, the correct option is [2].