IPA: //træŋˈkwɪlər//
KK: /træŋˈkwɪlər/
Calm and peaceful; free from disturbance or agitation.
The tranquil lake reflected the clear blue sky.
Comparative: more tranquil
Superlative: most tranquil
The word 'tranquiler' comes from the Latin 'tranquillus' (meaning calm or quiet) and the suffix '-er' (indicating a person who performs an action). Thus, 'tranquiler' refers to a person who brings calm or tranquility.
Think of someone who brings 'calm' ('tranquillus') — that's why a 'tranquiler' is a person who helps create a peaceful atmosphere.