…极了
jíle · HSK 3
…Extremely
💯 极 = extreme/utmost; 了 marks state — so '...极了' = '...to the extreme'
Pattern: [adjective]+极了 intensifies the adjective, like English '...extremely' or 'super...'. 好极了 = great!, 累极了 = exhausted. 极 alone means 'pole/extreme' (as in 北极 North Pole).
极 — wood radical 木 + 及 (jí, phonetic)
极 is a semantic-phonetic compound: 木 (wood) hints at the meaning, since the original sense was the ridgepole — the highest beam of a roof. 及 supplies the sound 'jí'. From 'topmost beam' the meaning extended to 'extreme, utmost, pole', as in 北极 (North Pole).
了 — pictograph of swaddled child with no arms
了 originally depicted an infant wrapped in swaddling cloth, with the arms hidden or bound — a variant of 子 (child) without the arms. From 'finished wrapping' it extended to mean 'completed' or 'finished,' which is its main modern grammatical use as an aspect particle marking completed action.