noun:

• draining blood from a live fish (from above the gills and at the base of the tail) to keep it fresh ［いけじめ］
• fasting fish for several days to preserve flavour and quality (and reduce mortality during transport) - esp. いけしめ
• killing fish in a fishtank (immediately before cooking); fish killed in a fishtank - esp. いけしめ

noun:

• draining blood from a live fish (from above the gills and at the base of the tail) to keep it fresh ［いきじめ］ ➜ 活け締め【いけじめ】
• fasting fish for several days to preserve flavour and quality (and reduce mortality during transport) - esp. いきしめ ➜ 活け締め【いけじめ】
• killing fish in a fishtank (immediately before cooking); fish killed in a fishtank - esp. いきしめ ➜ 活け締め【いけじめ】

noun / ~する noun:

• light reduction

~する noun:

• to reduce illumination

ichidan verb / transitive:

• to shorten; to cut short; to trim
• to cut down on; to reduce; to economize; to economise

godan ~ぐ verb / transitive:

• to chip (off); to shave (off); to slice (off); to sharpen
• to dampen (e.g. enthusiasm); to discourage; to weaken; to reduce - usually written using kana alone

noun:

• carry-back; bringing the ball back to one's own position (in rugby) - Sports term
• carryback; carrying over a deduction or credit from a prior year to the current year (to reduce income tax) - Economics term

ichidan verb / transitive:

• to loosen; to slacken Antonym: 締める
• to relax (attention, efforts, etc.); to let down (one's guard); to relieve (tension)
• to relax (a rule); to ease (e.g. restrictions); to loosen (control)
• to reduce (speed); to slow down; to ease up
• to make more gradual (of a slope)

~する verb (spec.) / transitive:

• to promise
• to abridge; to simplify; to shorten
• to reduce - Mathematics term

godan ~く verb / intransitive verb / transitive:

• to open; to undo; to unseal; to unpack
• to bloom; to unfold; to spread out
• to open (for business, e.g. in the morning)
• to be wide (gap, etc.); to widen

godan ~く verb / transitive:

• to hold (meeting, etc.); to give; to open
• to found (nation, dynasty, sect, etc.); to open (a new business); to set up; to establish; to start
• to open (ports, borders, etc.)
• to open (an account)
• to open up (new land, path, etc.); to clear; to develop ➜ 拓く
• to open (a file, etc.) - IT term
• to extract (root); to reduce (equation) - Mathematics term
• to cut open (fish) - as 魚を開く - Food term
• to change (kanji into hiragana)

godan ~く verb / intransitive verb:

• to flare (e.g. skirt)
• to slacken (into a poor posture) - as 体が開く, 肩が開く, etc. - Sports term

godan ~く verb / transitive:

• to pull out; to draw out; to extract; to unplug; to weed
• to omit; to leave out; to go without; to skip

auxiliary verb / godan ~く verb:

• to do to the end; to carry through

godan ~く verb / transitive:

• to let out (e.g. air from a tyre); to drain (e.g. water from a bath); to empty
• to pick out; to choose; to select; to extract
• to pilfer; to steal
• to remove; to get rid of; to take out
• to pass; to overtake; to outstrip; to get ahead of
• to pierce; to break through; to go through - also written 貫く
• to cut out (a shape); to create (a pattern) by dying the surrounding area
• to seize; to capture; to reduce
• to scoop (a story)
• to take out (an opponent's stones; in go)

godan ~く verb:

• to masturbate (of a male); to ejaculate (while masturbating) - slang - vulgar
• to take (a photo); to record (video) - slang

ichidan verb / intransitive verb:

• to lose; to be defeated
• to succumb; to give in; to surrender; to yield ［負ける］
• to be inferior to ［負ける］
• to break out in a rash due to (e.g. lacquer, shaving, etc.) ［負ける］ ➜ 気触れる【かぶれる】

ichidan verb / transitive:

• to reduce the price; to give a discount; to throw in (something extra) for free ［負ける］