加紧
jiā jǐn · HSK 7
to step up
🗜️ 加 add + 紧 tight = add tightness, crank the pressure up, speed it up
加 means add or increase; 紧 means tight or urgent. Adding tightness to a task means stepping it up and speeding it along. The clamp tightens harder, just like you intensify the effort.
加 — force 力 + mouth 口
加 is traditionally analyzed as a compound of 力 (strength) and 口 (mouth), suggesting boasting or exaggerating one's effort with words. From this it extended to the meaning 'to add' or 'increase'. Today it is used broadly for addition, both literal and figurative.
紧 — 臣 minister + 又 hand on top + 糸 silk below
Originally written 緊, this character combines 臤 (a hand 又 grasping firmly, with 臣 as phonetic) over 糸 'silk thread'. The image is of silk threads pulled taut by hand, giving the core meaning 'tight, taut'. From there it extended to 'urgent' and 'pressing'.