IPA: /ˌɪnspəˈreɪʃənl/
KK: /ɪnˌspɪrəˈneɪʃənl/
Something that motivates or encourages people to feel hopeful and positive.
The speaker gave an inspirational talk that moved everyone in the audience.
Inspirational → It is formed from "in-" (meaning in or into), "spirare" (meaning to breathe), and "-al" (meaning relating to). The word "inspirational" refers to something that relates to breathing in ideas or motivation, thus uplifting or encouraging others.
Think of 'breathing in' new ideas ('spirare') that inspire you, and remember that 'inspirational' means something that motivates or uplifts.